144 articles trouvés pour ce sujet.
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3/8 and 0.375 |
2019-12-05 |
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Zamyiah pose la question : how does 3/8 turn into 0.375 i just don't understand it the question is hard. please answer in time thank you for your time. Penny Nom lui répond. |
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A repeating decimal divided by a whole number |
2019-05-01 |
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Emily pose la question : How do you divide repeating decimals by whole numbers? Penny Nom lui répond. |
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Non-repeating decimals |
2018-12-28 |
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Grace pose la question : What is non repeating decimal Penny Nom lui répond. |
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Converting decimals to common fractions |
2018-05-08 |
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Ruth pose la question : what does the 0 represent in .018 versus the decimal .180? As in, changing these to fractions? Thank you. Penny Nom lui répond. |
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The decimal form of a fraction |
2018-01-12 |
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Tom pose la question : Prove that the decimal representation of the quotient of 2 integers must repeat (if it does not terminate). Penny Nom lui répond. |
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Changing a mixed number to a decimal |
2017-09-23 |
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karla pose la question : to change an improper fraction into a decimal 5 3/4 equals Penny Nom lui répond. |
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Long division with decimals |
2017-06-16 |
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Kenneth pose la question : Hello:
Why is it recommended to move the decimal from a divisor when dividing so that the divisor is a whole number?
I know how to divide by moving the decimal from the divisor, but I cannot explain the reason.
I thank you for your reply. Penny Nom lui répond. |
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Is 22/7 bigger or smaller than 3.14? |
2015-11-06 |
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Natalie pose la question : Is 22/7 bigger or smaller than 3.14? Harley Weston lui répond. |
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The sum of two repeating decimals |
2015-10-22 |
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Kaitlin pose la question : Here is the question I am struggling with:
Is the sum of two repeating decimals always repeating decimal? Explain your answer and give an example.
I answered this question thinking that no you cannot but only when adding 0.9 repeating, but my professor said this was incorrect.
Thanks for the help!
-Kaitlin Penny Nom lui répond. |
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2.236... |
2015-10-13 |
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Ann pose la question : 2.236...
What is the most specific category of numbers does this fall into? Rational or Irrational? Does the .... mean that it repeats? Harley Weston lui répond. |
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Repeated decimals |
2015-05-09 |
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Vir pose la question : Years ago I (re?)discovered 'cyclic division'. For example: if you arrange the number along a circle and put the number 142857 at the centre
all the numbers taken cyclically, starting with 1, are fully divisible by 37. Whatever the starting point of this number, it remains fully divisible by 37.
what is more, the number can be formed by taking the digits clockwise as well as anti-clockwise..This I call "full cyclic divisibility". In many cases, only clockwise cyclic divisibility is possible. But I have not come across a case where ONLY anti-clockwise divisibility occurs. Thus clockwise cyclic divisibility seems to be favoured. Could this be construed as a sign of chirality in mathematics?.. Chris Fisher lui répond. |
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How do I make fractions into decimals? |
2014-05-31 |
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jay pose la question : Hi,
I wanted to know how do I make fractions into decimals example 1 3/8? Penny Nom lui répond. |
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Decimals,fractions and percentages |
2014-04-11 |
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Frances pose la question : Ask an expert to find out their real life usage of your topic... that is the question.
meaning what is your real life usage of using decimals,fractions and percentages.
This is all part of my math assignment to ask an expert real life usage... so please
reply back as soon as possible Penny Nom lui répond. |
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0.35 as a fraction |
2013-11-28 |
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Laura pose la question : How do you write 0.35 as a fraction or mixed number?
Laura Penny Nom lui répond. |
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8 3/4 as a decimal |
2013-05-15 |
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Luisa pose la question : How to make 8 3/4 into a decimal Penny Nom lui répond. |
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Converting a mixed number to a decimal |
2012-11-10 |
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Mahaveer pose la question : Convert mixed fraction to decimals: 4 2/6 Penny Nom lui répond. |
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Converting a fraction to a decimal |
2012-10-20 |
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A Teacher pose la question : My students want an easy way to convert a fraction to a decimal, can I get one from you? Penny Nom lui répond. |
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3.8 x 2.2 |
2011-08-18 |
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Isaac pose la question : Question from isaac, a student: I am struggling in math & I need help on multiplying 3.8 x 2.2. Can you helpme Melanie Tyrer and Harley Weston lui répond. |
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Write 3 1/5 in decimal form |
2011-03-24 |
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Stephenie pose la question : converting fractions????
3 1/5 into decimal??? Penny Nom lui répond. |
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Decimal form |
2010-09-08 |
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Tracy pose la question : What is the decimal form of 0.14 x 10 the the first power? Penny Nom lui répond. |
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How are decimals used in every day life? |
2010-09-01 |
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Keith pose la question : how are deciminal used in every day life Tyler Wood lui répond. |
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Does 1= 0.9999....? |
2010-04-07 |
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Asia pose la question : Does 1= 0.9999....? There seems to be different opinions on this. Robert Dawson lui répond. |
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Decimals and fractions |
2010-03-16 |
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fay pose la question : why do we use decimals in place of fractions in everyday life? Robert Dawson lui répond. |
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Repeating Decimal |
2010-03-14 |
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Gerald pose la question : Find the 1987th digit in the decimal equivalent to 1785/9999 starting from decimal point. Can you give us a short but powerful technique in solving this problem? thanks so much.. Chris Fisher lui répond. |
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Is 0.1234567891011.... periodic? |
2010-02-23 |
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Adriana pose la question : 0.1234567891011.......Is this fraction periodic ? Penny Nom lui répond. |
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Working with decimals |
2010-01-29 |
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linda pose la question : Write 3 numbers that are between the following:
2.15 meters and
2.17 meters Harley Weston lui répond. |
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Decimal equivalent |
2009-12-13 |
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Asia pose la question : In a forest,it rained 36 out of 90 days. What is the decimal equivalent of 30 out of 90 days Penny Nom lui répond. |
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A rate of 67 per 1000 |
2009-11-10 |
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ANTHNONY pose la question : if the rate is 67 per 1000 the fraction is 67/1000 how do I present the expanded form Penny Nom lui répond. |
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Ordering numbers |
2009-09-19 |
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tattiana pose la question : how do you order these numbers from greatest to least .625,.75,.20, and .5 Penny Nom lui répond. |
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Repeating decimal to fraction |
2009-09-18 |
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joan pose la question : how can i answer it easily to convert terminating decimal to fraction?
example of this is that, convert ...143143143... to fractional form Robert Dawson lui répond. |
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Integers and decimals in day to day life |
2009-06-29 |
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mitichie pose la question : can you tell use of integers and decimals in our day to day life. Penny Nom lui répond. |
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How many eighths are there in 1.25? |
2009-05-06 |
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Tamara pose la question : How many eighths are there in 1.25? Penny Nom lui répond. |
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More on mills |
2009-03-25 |
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Kenneth pose la question : If I want to express 13 mills as a decimal part of $1.00, the answer
is $0.013. This amount is found by dividing 13 mills by 1000
mills/$1.00.
Can 13 mills be expressed as a decimal part of another amount instead
of $1.00? For example, express 13 mills as a decimal part of $1.50
or express 13 mills as a decimal part of $0.10. What would these
amounts be? Robert Dawson lui répond. |
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How do I divide with a decimal is the divisor? |
2009-03-15 |
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Shelly pose la question : How do I divide with a decimal is the DIVISOR ( NOT divsor AND dividend.) ? Also, How do I know when to stop dividing?
P.s. please use long division Penny Nom lui répond. |
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Express 13 mills as a decimal part of $1.00. |
2009-03-13 |
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Kenneth pose la question : Hello:
I read the following in an old business mathematics textbook:
"Express 13 mills as a decimal part of $1.00."
I can determine the answer as follows: There are 1000 mills in or per
$1.00. 13 mills divided by 1000 mills/$1.00 equals $0.013, the answer.
My question is as follows: What does "...as a decimal part of $1.00"
indicate or represent from "Express 13 mills as a decimal part of
$1.00."?
Is (a decimal part of $1.00) any decimal less than $1.00 with the decimal having a dollar sign
before it.
I thank you for your reply. Harley Weston lui répond. |
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66 2/3% |
2009-03-10 |
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Traci pose la question : Please convert 66 2/3% into a decimal and a fraction Penny Nom lui répond. |
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mutiplying decimals |
2009-02-24 |
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telly pose la question : how to do this sum0.24*0.398 Robert Dawson and Penny Nom lui répond. |
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Decimals and fractions used in our daily lives |
2008-12-04 |
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josh pose la question : i have a projecct due friday and i need to know, how are decimals and
fractions used in our daily lives. i am having trouble coming up with
ideas. i need seven more that dont involve money or recipes. please
help me. Harley Weston lui répond. |
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How do I compare fractions and decimals? |
2008-11-18 |
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Alexis pose la question : How do I compare fractions and decimals ? Penny Nom lui répond. |
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A ratio to a decimal |
2008-11-14 |
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manny pose la question : Express 22 : 5 as a decimal. Round to the nearest hundredth Penny Nom lui répond. |
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How do you work out 2/17 as a decimal? |
2008-11-13 |
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p pose la question : how do you work out 2/17 as a decimal? Penny Nom lui répond. |
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A repeating decimal |
2008-11-07 |
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mike pose la question : what is 0.0028282828 recurring as a fraction? Penny Nom lui répond. |
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The part before the repetend |
2008-11-02 |
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Puerto pose la question : Hello,
I teach mathematics in a bilingual programme using English. I have learned that the group of digits that repeat in a repeating decimal is called repetend but i need to know how are called the previous ones when the decimal is a delayed-repeating one. I mean, in 0.34555555 5 is the repetend, the period is one and...how are called 34?
Thanks in advance. Stephen La Rocque and Penny Nom lui répond. |
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What are the equivalent to 0.68? |
2008-10-28 |
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clay pose la question : what are the equivalent to 0.68 ? Penny Nom lui répond. |
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What is the exact value of pi? |
2008-09-27 |
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mahesh pose la question : what is the exact value of pi.
22/7 is accurate value of pi, if not then how can i find out the exact pi value. Harley Weston lui répond. |
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0.99999.... |
2008-09-23 |
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Eve pose la question : Hi, i had a problem with change 0.99999... this recurring decimal to a fraction. I know the method, but the answer I got is 1 as you can see below.
Where have i done wrong? Harley Weston lui répond. |
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Repeating fractions |
2008-09-09 |
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Juli pose la question : My teacher recently put my math class to the test...
We were deiscussing repeating fractions and she asked
us to find out what the bar over a repeating decimal is called. I found out
it was called the vinculum. But she also said to find out what the number
under the vinculum was called. I can't seem to find it anywhere. Penny Nom lui répond. |
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How would put .12 with 2 repeating into a fraction? |
2008-09-09 |
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Savanna pose la question : How would put .12 with 2 repeating in fraction?
Savanna! Penny Nom lui répond. |
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0.151515...=15/99 |
2008-09-08 |
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Emma pose la question : This week, my Algebra teacher told us about the pattern between infinitely repeating
decimals and their corresponding fractions.
(ex. .2222222...= 2/9, .151515...=15/99, 456456456...=456/999, etc.)
I was just wondering the reason why this pattern occurs.
Is there a certain element that causes this pattern to occur?
Thanks
-Emma Penny Nom lui répond. |
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How do you write 92 tenths as a decimal? |
2008-09-05 |
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Miriam pose la question : How do you write 92 tenths as a decimal? Penny Nom lui répond. |
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Long Division with Decimals |
2008-08-28 |
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Ghita pose la question : I need help with these 2 questions:
Find the quotients:
52.576 divided by 21
71.331 divided by 93
Ralph spent 5/9 of an hour mixing paints and 7/9 of an hour painting.How much time in all did Ralph spend on his project?
Thank you,Please answer soon Janice Cotcher lui répond. |
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Convert Repeating Decimal into a Fraction |
2008-08-25 |
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Craig pose la question : Can you help me to convert:
0.444444 (repeating decimal - base 10) to base 9? Janice Cotcher lui répond. |
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Non-terminating, non-repeating decimals |
2008-08-03 |
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Peter pose la question : How do you take a random, non-terminating, non-repeating decimal into a fraction? Stephen La Rocque lui répond. |
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Sum of Digits |
2008-07-24 |
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Warren pose la question : If 100^25-25 is written in decimal notation, what is the sum of digits? Penny Nom lui répond. |
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A bijection from (0,1)x(0,1) to (0,1) |
2008-07-20 |
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Adam pose la question : I'm trying to prove that the function that takes the open square (0,1)x(0,1) to (0,1) is a bijection (and hence a continuum).
If we take an element (x,y) of (0,1)x(0,1) and represent (x,y) as (0.x1 x2 x3 x4..., 0.y1 y2 y3 y4...) aka x1 represents the tenths digit of x, x2 represents the hundredths, etc. Then we can define a function
f((x,y)) = 0.x1 y1 x2 y2 x3 y3... However, this is not a bijection. I hypothesize this is because you'd be unable to create the number 0.1 as x=0.1 and would have to be y=0, which contradicts the open interval (0,1) defined for y. We have been told though, if we create the same function, except that we "group" 9's with their next digit into a "block"
we can create a bijection. For example, if x=0.786923 and y=0.699213, then we define x1 to x3 as normal, but x4= 92, and x5=3. For y, we define y1 as normal, but y2=992, and y3 to y4 as normal. hence f((x,y)) = 0.7 6 8 992 6 1 92 3 3.
My questions are a) is my hypothesis on why the original function is not a bijection correct? b) why does the special blocking in the new function make a bijection? Victoria West lui répond. |
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.9 repeating plus .2 repeating |
2008-06-10 |
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megan pose la question : How do you express the addition of .9 repeating plus .2 repeating? Penny Nom lui répond. |
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How do you add decimals? |
2008-06-05 |
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nyheashiacurry pose la question : how do you add up decimals? Janice Cotcher lui répond. |
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Converting a decimal to a fraction |
2008-05-19 |
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judy pose la question : please explain how to get from the decimal number .3437 to the fraction 11/32 Leeanne Boehm lui répond. |
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Common fraction to decimal fraction |
2008-04-01 |
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chadwick pose la question : how do I turn 3/32 into a decimal Penny Nom lui répond. |
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The decimal equivalent of a fraction |
2008-03-24 |
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Mario pose la question : What is the decimal equivalent of the fractions 5/8? Penny Nom lui répond. |
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Repeating decimals |
2008-03-10 |
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Blaine pose la question : Is it possible to put a repeating decimal number into a calculator to solve a problem?
EX: Write 39.3939... as a fraction. Penny Nom lui répond. |
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Multiplying decimal numbers |
2008-02-05 |
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alwyn pose la question : Why should when you Multiplying Decimal numbers is value becoming less and less? don't you think even decimal number is a quantity and in no chance when it multiplies its should become less or nil !!!
In fact all Multiplying and or adding the value will go up and only when you subtract and divide it should become less !! Stephen La Rocque and Penny Nom lui répond. |
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Repeating decimals |
2008-01-29 |
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Malise pose la question : Write each repeating decimal using bar notation.
0.428571428... Penny Nom lui répond. |
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Change a mixed fraction into a decimal |
2008-01-23 |
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Qiana pose la question : I need to know how to change a mixed fraction into a decimal. the mixed fraction is
9 1/2 Penny Nom lui répond. |
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How many bags of cement will I need? |
2008-01-15 |
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James pose la question : I want to extend my front porshe more to the left atleast 14' 1" length wise and 5' 1" width wise with 4" thickness. Now i already decimalized in feet those inches, resulting with 14.08 length and 5.08width and 0.33 of thickness. I then Get my square feet of 71.53. And go on to cubic feet getting a 23.60 in cubic feet. Now i want to convert to cubic yards so i then divide 23.60 into 27 and get 0.87. Now my question is how would i use this to go and buy the necessary bags of cement knowing that a 94 lb. bag of cement is 1 cubic foot of bulk material. To fill 4 inch of thickness and 14' of length and 5 of width? Stephen La Rocque lui répond. |
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1.2 as a fraction |
2008-01-12 |
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Confused pose la question : i have confused my brain and its driving me crazy i am trying to write 1.2 as a fraction but each time i do it i come out with a different number please help Penny Nom lui répond. |
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Repeating decimals |
2007-12-02 |
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Jack pose la question : I've been working on an equation to support my theory of repeating decimals. Specifically the correlation between the 9 and 11 denominators. I wanted to know if there was already an equation to describe this correlation? Mine is x/11=.b repeating and b=9x, so if you use any single digit number for x (say 4) if 9 x 4 = 36 then 4/11 = .36363636... I just want to know if this theory already exists and if so, what is it called? Victoria West lui répond. |
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How do you convert eleven fifteenths into a decimal? |
2007-11-14 |
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Lauren pose la question : How do you convert eleven fifteenths into a decimal? Penny Nom and Stephen La Rocque lui répond. |
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A decimal to a fraction |
2007-11-01 |
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Lisa pose la question : i am trying to turn a decimal into a fraction. my example is to turn 10.5 into a fraction at its lowest form Penny Nom lui répond. |
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For which values of k will k/240 be a terminating decimal? |
2007-10-28 |
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Clara pose la question : For which values of k will k/240 be a terminating decimal? Stephen La Rocque lui répond. |
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0.24 1/2 |
2007-09-06 |
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Kenneth pose la question : The fraction, 1/2, in 0.24 1/2 occupies the 1/100 place along with the 4.
If the fraction, 1/2, is changed to a decimal, as in 0.245, the last 5 in 0.245 occupies the 1/1000 place.
Why doesn't the 1/2 in the decimal 0.24 1/2 occupy the 1/1000 place (0.001) instead of the 1/100 place? Stephen La Rocque lui répond. |
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Equivalent fractions |
2007-08-31 |
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Darlene pose la question : What is the equivalent decimal for 0.3 and 6.53 Penny Nom lui répond. |
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Converting a repeating decimal to a common fraction |
2007-08-22 |
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isabelle pose la question : how do you turn 6.333... into a fraction in simplest form? Stephen La Rocque and Penny Nom lui répond. |
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Division by decimals |
2007-08-15 |
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Brooklyn pose la question : I am studying for an exam, and I will not be able to use a calculator. I can not figure out how to do division is the number on the outside of the box is a decimal. Ex: 2/6.3=X Can you please help me figure this out? Penny Nom lui répond. |
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Repeating decimals and rational numbers |
2007-05-31 |
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lil pose la question : Why are repeating decimals considered rational numbers? Penny Nom and Gabriel Potter lui répond. |
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Fractions, decimals and profit |
2007-05-29 |
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fatima pose la question : how can i change a fraction into a decimal and how do i change a
decimal into a fraction................
anther question please what does making a profit have
to do with percentage change!!!!!! Penny Nom lui répond. |
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Equivalent decimals |
2007-03-16 |
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megan pose la question : Write an equivalent decimal for 13.48. Stephen La Rocque and Penny Nom lui répond. |
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A 15% tip |
2006-12-06 |
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Danielle pose la question : When she eats at a restaurant,Viviana like to leave a 15% tip,multiplying the price of the meal by 0.15. Franklin usually leaves a 20% tip,multiplying the price by 0.20.They both round up to the nearest $0.05. How much tip would Viviana leave for a $24.85 meal? Penny Nom lui répond. |
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The real numbers with decimal representations consisting of all 1s. |
2006-10-29 |
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Ivessa pose la question : Determine if the following set is countable or uncountable : the real numbers with decimal representations consisting of all 1s. Steve La Rocque and Walter Whiteley lui répond. |
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What is 1.7142857143 as a fraction? |
2006-10-01 |
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Lizzy pose la question : What is 1.7142857143 as a fraction? Stephen La Rocque and Penny Nom lui répond. |
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Converting a decimal into a fraction |
2006-09-06 |
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Andres pose la question : How do i convert a decimal into a fraction? Penny Nom lui répond. |
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The reciprocal of a decimal |
2006-08-21 |
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A student pose la question : I need help with finding the reciprocal of a decimal Leanne Boehm lui répond. |
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Converting fractions to decimals |
2006-07-25 |
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Diane pose la question : HOW DO I CONVERT A FRACTION TO A DECIMAL? (E.G,. 8/14 to ? )
And HOW DO I DIVIDE A FRACTION (e.g., 1/14 divided by 3) and then convert that answer to a decimal? Penny Nom lui répond. |
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Convert to decimal form |
2006-01-12 |
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A student pose la question : I would like to know the full answer on how to turn the fraction 3 3/8 into a decimal please. Penny Nom lui répond. |
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Common fractions to decimals |
2005-11-25 |
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A student pose la question : how do u turn 8 over23 into a decimal and how do u turn 8 over 29 into a decimal Penny Nom lui répond. |
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Isn't 1/3 written as a decimal .33? |
2005-09-21 |
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Lisa pose la question : Isn't 1/3 written as a decimal .33? My son informs me I'm wrong, but doesn't know the answer
Chris Fisher and Penny Nom lui répond. |
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Equivalent fractions |
2005-09-13 |
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Cindy pose la question :
I am a parent and aunt of a 5th grader.
My nephew has asked me what the equivalent decimal is of 0.4. Does he change it to a fraction or just add a zero either before or after?
Chris Fisher and Harley Weston lui répond. |
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0.999..., asymptotes and infinity |
2004-12-17 |
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Mike pose la question : My Name is Mike and I teach high school. I had a student ask me to explain why .9 repeating is equal to 1. Then he asked me about an asymptote, or why a parabola or any other curve for that matter can continually approach a value (like 1) and yet never attain a value of 1. He is thinking that these two should represent the same concept and yet they contradict each other. Do you have a solid explanation for him? Of by the way he is a 7th grader. Great little thinker!!!!! Claude Tardif and Harley Weston lui répond. |
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Common fractions to decimals |
2004-02-12 |
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A parent pose la question : I'm trying to help my son work with turning fractions into decimals and this seems foreigh to me after 20 years of not being in school. Can you give me a few illustrations and/or examples of how to do that?? Penny Nom lui répond. |
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Digits in the decimal expansion |
2004-02-11 |
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Leslie pose la question : In the decimal expansion of 1/17 what digit is in the 1997th place? Penny Nom lui répond. |
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3/8 as a decimal |
2004-01-13 |
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A student pose la question : My Math Midterm is tommorow and I am stumped... how do you turn 1 and 3/8 into a decimal... I know the answer is 1.375 but I just copied down what the teacher wrote on the board.
Oh, and what are the three cases of percents? Penny Nom lui répond. |
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0.810 and 0.801 |
2003-10-24 |
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Ahmed pose la question :
could you please tell me what is the greatest decimal fraction formed of the digits 0, 1 , 8? Is it 0.810 or 0.801, please give me the reason of the answer in details and the references if it possible. Penny Nom lui répond. |
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Why percentage? |
2003-09-03 |
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Vicky pose la question : My cousin aske me a question about the use of percentages and I'm not sure how to answer it. He wants to know why when there is a sale in a shop we use percentages and not fractions or decimals. Penny Nom lui répond. |
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X.9999... and X+1 |
2003-08-23 |
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David pose la question : I have read your answers to the questions on rational numbers, esp. 6.9999... = ? and still have a question: The simple algebraic stunt of converting repeating decimals to rational numbers seems to work for all numbers except X.999999.... where X is any integer. The fact that the method yields the integer X+1 in each case seems to violate the completeness axiom of the real numbers, namely that there is no space on the number line which does not have an number and conversely that every geometric point on the number line is associated with a unique real number. In the case of 3.999... for example, it seems that both the number 4 and the number 3.9999.... occupy the same point on the number line. How is this possible??? Penny Nom lui répond. |
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Repeating decimals |
2003-01-08 |
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A student pose la question : If k=.9repeating, and 10k=9.9repeating then 10k-k=9k, k=1 therefore .9repeating=1 and 1/3=.3repeating 3x1/3=.3repeatingx3, 3/3=.9repeating, therefore 1=.9repeating It would seem to me that .9repeating approaches one but never quite makes it. Can you clarify? Penny Nom lui répond. |
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Decimals in everyday life |
2002-11-24 |
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Fritz pose la question : How do you use decimals in your every day life? Penny Nom lui répond. |
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0.99999... |
2002-09-26 |
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Erica pose la question : Yesterday in my 8th grade math class we were being taught how to convert a Repeating Decimal into a fraction. Since I, for some odd reason, seem to understand math better than the rest of my classmates, i began to drown out my teachers explaination for the rule. While she was about half way through with explaining mixed decimals i came up with an unsolvable question. Like I said before, I understand how to turn a repeating decimal into a fraction, but how would I turn a repeating .9 into a fraction? We all know it would equal 9/9, but doesn't 9 over 9 also equal 1? Even though it comes very close to one, it never really equals one. I'm very confused about this and i would love it if you could clear this up for me. Penny Nom lui répond. |
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The number of decimal places in 1 over a power of 2 |
2002-09-12 |
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Allan pose la question : Does anyone notice that the maximum number of decimal place of the number 2 dividing 1 and its increment (4, 8, 16...etc) is the same as the power of number 2? eg. 22=4, thus the max number of decimal of 1/4=0.25 which is 2 decimal place and 2 is the number of power of 2 take 64 as example: 26=64, and take 1/64=0.015625 which has 6 decimal place (and is the power 6) Is there such a law in math? If yes, can you tell me what it is? Or is this my discovery? Paul Betts lui répond. |
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1/8 in decimal form |
2002-09-04 |
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A student pose la question : explain how you put 1/8 in a decimal form Penny Nom lui répond. |
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Common fractions to decimal fractions |
2002-04-02 |
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Natalie pose la question : My questions are: "how can I change 23/60 into a decimal. and give my answer to 2dp."?????????? 2nd question:for each of these pairs, which is bigger?
4/7 or 36%____________ 3/11or 0.29____________ 14/24 or 0.57___________ Penny Nom lui répond. |
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The reciprocal of a decimal mixed number |
2002-03-29 |
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A student pose la question : How do I find the reciprocal of a decimal mixed number? Penny Nom lui répond. |
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Multiplying decimals |
2002-03-10 |
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Kaitlin pose la question : I just recently had a test on multiplying decimals and I did not do really well on it. Only 5 kids out of 19 got a passing grade. My teacher says that she will give us a different test and we can take it again, but I'm still not sure of it. My teacher has taught me a lot and she had done a wonderful job of it but I'm just confused with where to put the decimals and stuff like that. I have a math practice workbook that I do for fun and they have nothing on decimals in it. I have checked on websites to try to find worksheets but I really couldn't find a good one. Can you please help me either give me some tips or clues or send me a worksheet. Penny Nom lui répond. |
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The square root of 2 |
2002-03-05 |
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Roger pose la question : Does two (2) have a square root or do the numbers just keep going? Are there any other numbers that behave like two when it comes to extracting the square root? Penny Nom lui répond. |
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Fractions in lowest terms |
2001-12-05 |
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Thomas pose la question : how to change decimal to a fraction in the lowest terms .7 .65 .019 .0111 .225 .1225 .625 .25 .025 .26 .875 .5 .75 .750 .33 .09 .44 .15 .12 .90 .044 .2500 .95 .500 .02 .40 .125 .1276 .00009 .45 .125 .1276 .375 .975 .054 .0005 .20 .2 .0001 .85 .80 .9 .0007 9.8 10.17 25.75 48.4 80.35 19.64 276.20 31.042 18.1034 Penny Nom lui répond. |
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0.999999=1? |
2001-09-06 |
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Catherine pose la question : Hi! My teacher told us that 0.9 repeating equals one. We discussed how this is true. But, I was wondering if there is a proof that this is true. If so what is this called? I was trying to find information, but, it's hard when you don't know the name. Walter Whiteley lui répond. |
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Commas in numbers |
2001-09-06 |
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Mike pose la question : When did the Ontario Education system drop the use of commas in large numbers and replace with a space? Why? Walter Whiteley lui répond. |
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Hours worked |
2001-07-18 |
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Carlos pose la question : I have a simple question:whats the formula to transform time into decimals? more exactly im working on a spreadsheet and i want to be able to type in for example hours worked: 11- 11:30 pm and a formula would tell me 12.5 hours how do i do it? Patrick Maidorn lui répond. |
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Repeating decimals |
2001-04-21 |
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Sarah pose la question : Hi, I'm working on a project for school. The theory I choose was "When turned into a fraction, a repeating decimal has a denometor that is a multiple of three." I have a couple of questions about this topic. My first question is, have you ever heard of this, and what can you tell me about it? My second question is, when I was testing this theory I came across .999... now, when this is a fraction it is 9/9 which is equal to one. The denometor is a multiple of 3, but it's a whole number. I don't understand how a decimal can be equal to a whole number since a decimal is a piece of a whole number. Please don't just show me a math problem, I don't want to see a math problem. I want to see an explanation of this theory and the decimal .999... Penny Nom lui répond. |
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1 = 0.999... |
2001-04-13 |
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Joan pose la question : I have a middle grade math question for you. I would like to know why .9999... = 1 ? I can not use algebra to show this or the following: We agree that 2 = 2 and that 2-2 = 0, so
1.00000...... -0.99999..... ---------------- 0.000000...... and 0.000... = 0 therefore 0.9 = 1 ----------OR--------------- 1/3 = 0.333333 and 3 X 1/3 = 1, so if 3 X 0.333... = 0.999... then 0.999... = 1 My teacher says that I can not use the above example to show why this is true, and that I must use a couple different examples. He says that there are several other ways. Do you know any? I could really use the help because I can't think of any other ways to show this is true. Thanks for any help you can give. Penny Nom lui répond. |
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Finite non-periodical numbers |
2001-03-27 |
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Wouter pose la question : Is there anyone who knows the official name for decimal finite non-periodical numbers such as 0.4 or 0.25 as opposite of numbers like 0.3333333... or 0.28571428571428...? Penny Nom lui répond. |
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Cube roots on a calculator |
2001-03-24 |
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Will pose la question : Hi my name is Will.I have a question about the calculator TI-83 Plus or the use of a scientific calculator. It is about using them to turn a cubed root to a decimal. When using that for a rational and irrational number. Rational numbers is a number that terminates or repeates. A irrational number goes on and on and uses ... (like pie). Like when you type the cube root of 8 it gives you 2, and that is a rational number. The squre root of 2 is 1.41421356... that is irrational. So why is it when you put the cube root of 16 in the calculator it says 2.5198421 that is rational it terminates at the ninth digit and my float is set for the tenth? But why when you do it by hand you get the 2 times the cube root of 2 and that is irrational? Why is that? Judi McDonald lui répond. |
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The repetend in repeating decimals |
2001-03-21 |
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Sharon pose la question : What is the name for the bar over the repetend in repeating decimals? Also, what is the name of the long division "house"? Penny Nom lui répond. |
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Converting percents to decimals |
2001-03-01 |
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Elliot pose la question : My math question is about Converting Percents to Decimals, here it is- Convert 37 1/2 = ? Penny Nom lui répond. |
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More repeating decimals |
2001-01-17 |
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Alan pose la question : I am neither a math teacher nor a student, but I hope you will consider my question anyway. I recently was discussing repeated decimals with a friend, and went on the web to find out more about a pattern was looking for years ago. In doing so I came upon your correspondence on repeating decimals. . . . Chris Fisher and Penny Nom lui répond. |
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Multiplication of fractions |
2001-01-08 |
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Angela pose la question : Questions:
1. represent multiplication of fractions via an area model 2. describe why, not just how, to round decimals Penny Nom lui répond. |
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Repeating decimal notation |
2000-12-31 |
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Clarende Duby pose la question : I have seen single repeating decimals for ex. 1/3 = 0.3 with the dot above the 3 to represent the repeating decimal. Then, there is the more common form of the bar over the top of the repeating number or group of numbers (called the period?). Which notation is correct? Penny Nom lui répond. |
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Mixed Fractions |
2000-12-09 |
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Tim Finch pose la question : My son is having problems with mixed decimals and mixed fractions.. I am unable to find any information or examples on this subject so I can show him how to do it.. for example how do you make a mixed decimal or fraction out of 7/16 Penny Nom lui répond. |
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Dividing with decimals |
2000-11-15 |
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Alex pose la question : I teach math and my class and I were discussing the dividing of decimals. I explained that if there is a decimal in the divisor, it needs to be moved and so does the decimal in the dividend. My question is why is it necessary to move the decimal point in the divisor before dividing? Penny Nom lui répond. |
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Multiplying decimals |
2000-10-16 |
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Lily pose la question : I need help with mutiplying decimals (example) 2.28*0.48( * = times). Harley Weston lui répond. |
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Repeating decimals |
2000-10-06 |
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Mary O'Sullivan pose la question : I understand that with repeating decimals (those with a pattern), the number of digits repeated is put into fraction form with the same number of 9's ex. 0.4444 = 4/9 0.145145145 = 145/999 How can I explain why this is so? Some inquisitive 8th graders are anxious to find out! Penny Nom and Walter Whiteley lui répond. |
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Rational Numbers |
2000-09-14 |
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Josh Kuhar pose la question : How can you tell a number is rational? Harley Weston lui répond. |
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Pi to 5 decimal places |
2000-06-03 |
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Emily pose la question : The question is find the value for pi to 5 decimal places???? Penny Nom lui répond. |
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Rounding |
2000-04-15 |
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Tawana Brown pose la question : I was uncertain as to whether a number such as 85.25 rounding to the nearest tenth would be 85.3 or 85.2. I thought I had heard somewhere that if 5 is the last number that you don't round up. But I have also heard that anything 5 and above you do round up. It's been awhile since I've done rounding, so I need a refresher course. Walter Whiteley and Harley Weston lui répond. |
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The sum of repeating decimals |
2000-02-15 |
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Caitlin Harris pose la question : Express 0.111... + 0.121212... + 0.123123123... as a repeating decimal and its equivalent fraction. Show work. Also, are there any extensions to this problem? In other words, are there any questions that we could ask that may be related to this problem? Penny Nom lui répond. |
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Comma as decimal separator |
1999-12-18 |
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Franck Menuge pose la question : Could somebody tell me the origin of the use of a 'comma' as a decimal separator and of a 'dot' for thousands in the French numeric system, ex.1.234,56 Is it only used in France or in other european coutries? Why is it different in the UK? Patrick Maidorn and Penny Nom lui répond. |
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Bases other than 10 |
1999-12-06 |
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Garret Magin pose la question : We are doing a lesson on numbers of other bases than 10. We are working with binary, octal, and Hexadecimal. I was wondering what is used to represent number of different bases other then 16? Does it just continue on with the alphabet and if so what happens when you get to Z. It would be a help if you could answer this because it is really bugging me. And none of the math teachers at my school could let me know. Claude Tardif and Patrick Maidorn lui répond. |
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Repeating decimals |
1999-11-22 |
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Andrew pose la question : Is 1.9 repeating the same as 2? Walter Whiteley lui répond. |
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An equivalent decimal |
1999-10-14 |
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Cheryl Wendlandt pose la question : I have a question in my book that is one and five sixths and you are to put them in an equivalent decimal. I'm sick at home or I would be able to ask my instructor. I would appreciate any help. Penny Nom lui répond. |
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Fractions, percents and decimals |
1999-09-19 |
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Sue Farr pose la question : My son is in 5th grade, and I can't seem to find any papers that have a simple explanation of how to convert decimals into fractions, percents into decimals, and vice-versa. Harley Weston lui répond. |
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Repeating decimals |
1999-09-18 |
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Kavoos Bybordi pose la question : I dont know how to change a reccuring decimal to a fraction please could you tell me the method. Penny Nom lui répond. |
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Repeating decimals |
1999-05-21 |
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Stan pose la question : Hi, I am in Honors Math, and have confronted everyone, including teachers, about repeating decimals. What interests me is the number 0.9... and 1. Everyone says that since there is no number between 0.9...(repeating) and 1, that 0.9... = 1. However, isn't a repeating number a representation of a number, and not a real number? Let's look at it this way. 0.9 is close to 1. 0.99 is closer. 0.99999999999999 is even closer. so, 0.9... is a representation of it's closeness to 1. it's an active number... I don't understand how 0.9... is equal to 1. Please help me prove that 0.9... does NOT = 1. Penny Nom lui répond. |
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The square root of two is never supposed to end |
1999-03-06 |
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a wondering student pose la question : i am algebra II and am in the 9th grade. today we were talking about rational and irrational numbers. When we were talking about square roots my friend and i were talking and we thought of something. if you have a square with sides of length one then the diagonal of the square is the square root of 2. Now the square root of two is never supposed to end. But the diagonal of the square ends so therefore doesn't the square root of 2 end. our math teacher did not really answer our question because it was not in the lesson plan and not to many people would see where we were coming from. the answer is really bugging me and i would like to have your input. Jack LeSage and Penny Nom lui répond. |
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Dividing Decimals |
1999-02-06 |
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Melanie Campbell pose la question : i ugently need to know how to divide a decimal by a decimal eg:6.0 divided by 2.4 i need to show all working on a basic skills exam please help!!!! mel Jack LeSage lui répond. |
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Turning Fractions into Decimals |
1999-01-16 |
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Lynn pose la question : How do you do it step by step Jack LeSage lui répond. |
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Place Value |
1999-01-05 |
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Reg pose la question : I work in a Section 27 classroom with various grades. I am looking for assistance on how to deliver a lesson on place value:decimal numbers keeping in mind that they need to see it (visual) to comprehend. I am looking for grade 4-6 level. Jack LeSage lui répond. |
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6.99999... = ? |
1998-12-05 |
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Tom pose la question : I have had a rather heated arguement with my students. Please settle this for me. Solve <,>, = 6.99999... __ 7 Thank you. Penny Nom lui répond. |
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Terminating decimals |
1998-11-16 |
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Debra Karr pose la question : A college student studying elementary education asked me a question that I could not think of the correct answer. How can you look at a fraction and tell if is a terminating or non terminating decimal? Jack LeSage and Penny Nom lui répond. |
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Fractions |
1998-10-27 |
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Jessica Braimoh pose la question : I have a problem that I just can't figure out!! Put into a fraction a) -1.157... b) 0.046... c) 0.032... d) -0.3234... Please show how you got the answer and how you came to it(step by step) Thanks Jessica Braimoh grade 9 Ontario Harley Weston lui répond. |
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Repeating Decimals |
1998-10-01 |
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Chris Norton pose la question : Could you PLEASE give the formula to find out the number of digits in a repeating decimal before it repeats. I have been trying to get it for weeks from Math sites on the Internet. Can you please, please help me ? Chris Norton Chris Fisher and Penny Nom lui répond. |
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Rational and Irrational Numbers |
1998-09-19 |
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Ri pose la question : I am trying to explain rational & irrational numbers to my niece who is grade 7 and am having difficulties. Could you please explain the difference between rational & irrational numbers. Thank you Ri Penny Nom lui répond. |
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A Question About Pi. |
1997-07-08 |
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Mike Chan pose la question : I have read the section Repeating Decimals in your data base. It mention that 1/17 has at most only 16 repeating digits. But, why does "pi" have an infinite number of digits (and not repeating ). Penny Nom lui répond. |
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Repeating Decimals |
1997-01-24 |
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Grant Reed pose la question : Is there a way to tell that the repeating decimal for 1/17 has no more than 16 repeating digits? Penny Nom lui répond. |
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Repeating decimals |
1996-09-09 |
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Alice pose la question : What is the line called that is placed over the decimal to show that it is infinitely repeating? The Centralizer lui répond. |
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Pronunciation |
1996-03-05 |
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Todd Stienhauser pose la question : Is 123.4 pronounced "one hundred and twenty three and four tenths"or "one hundred twenty three and four tenths"? Penny Nom lui répond. |
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