







Converting inches to centimeters 
20180525 

Jason pose la question : Hi!
Is there a method to approximately convert inches to cm in my head without using a calculator?
Thanks!
Jason Penny Nom lui répond. 





Converting decimals to common fractions 
20180508 

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. 





4444 base five 
20161111 

John pose la question : If 4444 is a number in Base5, is 624 its value? Penny Nom lui répond. 





Converting a fraction to a percentage 
20160222 

Preitty pose la question : How can I turn fractions into percentages when the denominator is not a number that can multiply to 100? Penny Nom lui répond. 





How do I make fractions into decimals? 
20140531 

jay pose la question : Hi,
I wanted to know how do I make fractions into decimals example 1 3/8? Penny Nom lui répond. 





Converting to base 5 
20140410 

Usama pose la question : Convert the numbers used in the following expressions into those of basefive and solve :
21+34108+62
Convert the result so obtained into decimal system and thus check your answer? Penny Nom lui répond. 





Converting cost per cubic yard to cost per ton 
20140205 

Mayra pose la question : If 18 cubic yards= 25 tons and it's $28.00 per yard how much is it a ton. I need help please a refresher on my algebra. Thank you Penny Nom lui répond. 





Converting from base 4 to base 10 
20111129 

anjg pose la question : How to convert base 4 number 2^11 to base 10 number? Penny Nom lui répond. 





Converting base 3 to 5 
20110228 

Harry pose la question : Hey Math Central, I came across your website and im in need of help on my maths c assignment. I have to convert base 3 to 5 without converting back to ten. I heard that you can use patterns in 3 and 5 to make an equation but im not sure how to and i also heard you can use logarithms but i dont know how to use those so im kinda stumped. Robert Dawson lui répond. 





How would put .12 with 2 repeating into a fraction? 
20080909 

Savanna pose la question : How would put .12 with 2 repeating in fraction?
Savanna! Penny Nom lui répond. 





A 3digit number in base 7 has its digits reversed when expressed in base 9. 
20070128 

Ashley pose la question : A 3digit number in base 7 has its digits reversed when expressed in base 9. Find this number. Penny Nom lui répond. 





converting square miles into square meters 
20070127 

Susan pose la question : how do you convert square miles into square meters Stephen La Rocque lui répond. 





Converting a decimal into a fraction 
20060906 

Andres pose la question : How do i convert a decimal into a fraction? Penny Nom lui répond. 





Converting sq ft to sq meters 
20060803 

JB pose la question : I would like to convert 2700 square feet into square meters. Penny Nom lui répond. 





Converting units 
20060121 

A student pose la question : How can you solve a measurement problem by changing it to a fraction of the new unit that follows such as:
18 inches = yard
40 minutes =  hour
5 days =  week Penny Nom lui répond. 





Cubic feet and cubic yards 
20051112 

Mike pose la question : I need to know how to calculate square feet into yards of material. Example: 1320 sq. ft. surface area by 1 in. depth. What does this equal in cubic feet and yards. Thanks for any help you can give me. Penny Nom lui répond. 





Converting from base ten to base five 
20050921 

Julie pose la question : My sister is home schooled and we are trying to convert from base 10 to base 5. We are trying to teach and we have never had this in school. If we could have some examples of some problems and how to do them we would appreciate this. Penny Nom lui répond. 





Converting from grams to milliliters 
20050915 

A student pose la question : What if you don't know the liquid that you are converting from grams to milliliters? Penny Nom lui répond. 





Converting rational numbers 
20050807 

Joe pose la question :
I am helping my son with his converting rational
numbers in the form of A/B where A and B are integers and
B not equal to zero
I think I am doing this right but I am not sure so
below are the problems and our answers are beside
them, please let me know if these answerers are correct
Penny Nom lui répond. 





Converting coordinates 
20041025 

Allen pose la question : I am trying to help my son with his home, but I don't remember these conversions. Please help.
1. Convert the following coordinates
Cartesian x = 7, y = 24
2. Convert the following coordinates
Polar r = 4, theta = pi / 3 Penny Nom lui répond. 





Converting from base 10 to base 5 
20030910 

Susy pose la question :
My son, who is 9 in grade 5 has been asked to convert base 10 numerals into base 5. His first question of: 24(10) he has calculated to be 4x5 + 4x1 = 44 (5) The next question however is the tricky one.Ý We know the answer is supposed to be 100 but we find it difficult to get this in the way he understands it. 25 (10) = _________________ 100 (5) Can you help us figure out how we reach the answer. Claude Tardif and Penny Nom lui répond. 





Converting to base 10 
20030828 

Karen pose la question : My son is in 5th grade.Ý He is learning how to convert numbers from base 2 to base 10, and base 5 to base 10.Ý Can you explain it to me in the simplest terms? Penny Nom lui répond. 





Numbers in base 5 
20030216 

Lori pose la question : I'm trying to help my 6th grader with converting numbers like 82 to base 5 and 182 to base 12. We saw your examples on 613, but still are confused. Penny Nom lui répond. 





Converting percents to decimals 
20010301 

Elliot pose la question : My math question is about Converting Percents to Decimals, here it is Convert 37 1/2 = ? Penny Nom lui répond. 





Converting Metric Measurements 
19990408 

Rick pose la question : Do you have any simple explanations for converting Metric measurements to other Metric measurements?? What helpful hints do you also have for a 5th Grader... Penny Nom lui répond. 





Converting mm's to inches 
19990222 

Paul White pose la question : It has been a long time since high school and I do not remember how to convert mm to inches. Could you please tell me what this would convert to in inches? 210 X 254 mm. Chris Fisher lui répond. 

