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	Une multiplication		2009-04-03
		josee pose la question : 24/6x5+40-10= le x est une multiplication et il n'y as pas de parenthèses. Merci Josée Antoine Letarte and Claude Tardif lui répond.
	A times table in base 5		2020-03-11
		Felix pose la question : Design a time table for numbers 1-10 in base 5 Penny Nom lui répond.
	Multiplication base 8		2020-02-19
		Tamesha pose la question : Let’s count with the symbols 0,1,2,3,4,5,6,7 (base 8) A). Create a multiplication table for this base B). Compute the following products using the multiplication algorithm I). 7605 times 3713 II). 63725 times 40627 Penny Nom lui répond.
	3 yards 6 inches times 7		2018-02-08
		Tamara pose la question : 3 yards 6 inches × 7 Penny Nom lui répond.
	Multiplication and repeated addition		2016-11-23
		Anandmay pose la question : Hello I was looking closely at early arithmetic where I found how we discovered properties of Arithmetic. Like:2 x 3 = 3 x 2. This can be proved by considering a 2-D figure(actually,quadrilateral) having length consisting of 2 boxes of 1-by-1 dimensions and breadth of 3 boxes of the same dimensions. Now,consider it again,but,this time,length of 3,and breadth of 2 of such 1 by 1 boxes. We now notice that we can fit the 2 types of rectangles formed on each other precisely. So the multiplicative property of commutativity is true for all natural numbers as we can generalize the result(in our mind,for self satisfaction). Now,can you find me a nice satisfactory reason of why a fraction times a natural number equals the number times the fraction? I mean, for example,i can understand the meaning of 3 x 2/3 to be three times 2-3rd,that is, 2/3+2/3+2/3.Fair enough. But here is the problem:By definition and actual meaning of multiplication, a x b means the repeated sum of b,done 'a' times. So what is the meaning of doing 2/3 x 3?The repeated addition of 3 how many times??2/3 times??Not making sense,right?And even we have not proved yet the commutative property of numbers INCLUDING fractions.So how can we resolve this problem and make these things meaningful? Thanks Penny Nom lui répond.
	Pizza delivery		2016-04-03
		Andrew pose la question : Suppose you own a local pizza restaurant, Pizza with Pizzazz, and in order to compete with the big pizza chains in your area you are considering an advertising campaign offering customers a free pizza if their pizza is not delivered in 30 minutes or less. Even though your pizza restaurant is known for its fast and friendly delivery service, you are not sure if you can afford to give away too many pizzas for free. Looking over your past 12,421 pizza deliveries you find out 97% of the pizzas were delivered in 30 minutes or less. Calculate the probability that all 100 randomly selected pizza deliveries will have been made in 30 minutes or less? Hint: Use the multiplication rule. (Round 4 decimals) I'm really stumped on how exactly to do this problem. I don't need the answer just the steps broken down to show me how to get it! It would be gladly appreciated if you could help! Penny Nom lui répond.
	A fact family containing 4, 4 and 16		2014-10-14
		Leslie pose la question : I am helping my son and the question is 4,4,16 in fact family what does that mean Penny Nom lui répond.
	Multiplication in base five		2014-08-07
		Alise pose la question : Hi Maths Central! I was wondering if you could help me with multiplying in base 5. I have read a question previously answered by you in regards to this but got fairly confused by it and was hoping you could help me with my question. My question is: Multiply 1422 base 5 by 21 base 5 keeping these numbers and answer in base 5. Would you also be able to explain how to get to the answer? Thanks! Penny Nom lui répond.
	60% as much as $30.		2014-07-18
		Kenneth pose la question : Question from Kenneth: Hello: Do you know why some "as...as" phrases indicate multiplication? For example, ? is 60% as much as $30. This is equivalent to 60% X $30 = $18. How does this make sense? I saw this example in an old textbook on business mathematics, but the author did not explain why it is equivalent to multiplication. I thank you for your reply. Robert Dawson lui répond.
	Base 5 arithmetic		2013-11-27
		samuel pose la question : Good day sir, please i don't understand when you say 4x4=13 in base five? In fact, am always having difficulties in addition, subtraction, division and multiplication of number in the same base other than base ten. Please can you give me one example each with details explainations? Penny Nom lui répond.
	Six-digit passwords		2013-03-19
		Judy pose la question : Hello: Can you please explain why the answer to the following question is 10^6? What is the number of possible six-digit passwords when using the digits 0 through 9, with repetition allowed. Thank you. Penny Nom lui répond.
	Multiplication in base two		2013-02-01
		Michael pose la question : multiply in the indicated base 110two*11two Penny Nom lui répond.
	The multiplication table for the different bases		2013-02-01
		sylvia pose la question : I am having a difficult time trying to figure out how to fill in the multiplication table for the different bases. i don't know how to get the numbers. Penny Nom lui répond.
	4 x 2		2011-08-30
		Lucjan pose la question : how to sketch a diagram that shows 4x2 expression? Penny Nom lui répond.
	3.8 x 2.2		2011-08-18
		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.
	Multiplication and order		2011-01-21
		Janet pose la question : IN A MULTIPLICATION SENTENCE BASED ON A DRAWING..IS THERE ANY ORDER FOR THE MULTIPLICAND ANG MULTIPLIER FOR THE ANSWER TO RIGHT? Robert Dawson lui répond.
	Convert to multiplication		2010-10-23
		angelina pose la question : how to covert 5+5+5=15 to multiplication Penny Nom lui répond.
	Geocaching		2010-10-15
		Clint pose la question : I am stuck on a puzzle for Geocaching which is a GPS game. I know it is a number matrix but don't know how to start. [1 -7 16 -3 -9; 1 -3 18 -20 -33] x [1 8 -9 3 5; 0 1 0 4 2; 0 0 1 2 1; 0 0 0 1 -1; 0 0 0 0 1] = ? Stephen La Rocque lui répond.
	1/6 x 5 x 12 = what		2010-02-19
		dana pose la question : 1/6 x 5 x 12 = what Lorraine Dame lui répond.
	Multiplying Large Numbers		2009-07-09
		Jessica pose la question : What is 12 billion X 6 trillion? Janice Cotcher lui répond.
	Multiplying Large Numbers		2009-07-09
		Jessica pose la question : What is 12 billion X 6 trillion? Janice Cotcher lui répond.
	Fraction Word Problem		2009-05-13
		Sonya pose la question : Debbie wants to eat 1/6 of her 12 pieces of candy. How many pieces did she eat ? Janice Cotcher lui répond.
	Choices at a restaurant		2009-04-13
		Rob pose la question : There is a restaurant you get: Rice/Noodles (1) Main Ingredient (any) Sauce (1) 1 1 1 2 2 2 3 3 3 4 4 4 5 5 5 6 6 6 7 7     8     9     10     11     12   So the question is how many different combinations are there. You can only have 1 rice/noodles in a selection and only 1 sauce in a selection but you can have between 1 and all twelve mains in a selection. there are 7 rice/noodles , 12 mains and 6 sauces. How many possibilies. I did it mentally in the restuarant, no pen, paper or calculater and i got 3276..i think thats wrong. please help Rob Robert Dawson, Stephen La Rocque and Claude Tardif lui répond.
	Multiplication of polynomials		2009-04-07
		Carla pose la question : I am struggling to understand Multiplication of Polynomials. No matter how hard I try to understand Multiplication of Polynomials, I just can't get it! The problem that I am trying to solve is this : -3x^3y(-y + 2 -x^2 + x) Robert Dawson lui répond.
	mutiplying decimals		2009-02-24
		telly pose la question : how to do this sum0.24*0.398 Robert Dawson and Penny Nom lui répond.
	Multiplying negative numbers		2009-01-15
		stephanie pose la question : hi, I'm currently working in a grade 8 class where the students are learning about integers. the students were asked to find examples of how integers are applied in real life. they were able to find aplications for: adding and subtracting both positive and negative integers. however, we could not find an example of where two negative integers would be either divided or multiplied together in real life. For example: (-2)(-4)= +8. please help. Harley Weston lui répond.
	Multiplication		2008-11-14
		natalie pose la question : what is 8 times 30 Penny Nom lui répond.
	multiply = 3a - 3b by a+b		2008-07-15
		chaleen pose la question : multiply = 3a - 3b by a+b Penny Nom lui répond.
	Matrix multiplication		2008-04-08
		manashi pose la question : i. why matrix division is not possible? ii.when we add or subtract two matrix , getting the result by addind or subtracting correspondind elements....but in case of multiplication it is not but why? Harley Weston lui répond.
	What fraction of 45 is 10?		2008-04-06
		Scott pose la question : 45 x fraction? = 10 Penny Nom lui répond.
	2 times 0 times 0 times 4		2008-03-30
		ben pose la question : what is 2 times 0 times 0 times 4? Penny Nom lui répond.
	Fact families with multiplication and division		2008-01-16
		Donna pose la question : I am trying to help my granddaughter with some math homework. I looked at what you have on fact families. Am I correct to assume that the same process applies to multiplication and division as well? Her question asks for fact families for 2, 8, & 16. Penny Nom lui répond.
	Multiplying numbers in bases other than 10		2008-01-08
		Imaiya pose la question : In class we've been learning about numbers with a base other than ten. For example, base 7, base 5, and base 6. What's really stumping me is how to multiply these numbers, when they aren't a base of 10. I've had it explained to me once, but don't seem to understand it. Here are the equations, and I've listed the first few numbers for that particular base. Base 5: 0,1,2,3,4,10,11,12,13,14,20 etc... The Equation: 34 x 42 Base 9: 1,2,3,4,5,6,7,8,10,11,12,13,14, etc... The Equation: 56 x 78 If you could explain to me how to multiply numbers with any type of base, I'd really appreaciate it. Also if you could show me how to do one of the questions that I listed, that would really help me =) Thanks so much, and once again, thank you for your great site! Stephen La Rocque lui répond.
	y squared over 3 times 8 over y		2007-09-30
		John pose la question : y squared over 3 times 8 over y Stephen La Rocque lui répond.
	Multiplcation of two negative numbers		2007-07-26
		Brett pose la question : Someone asked a question about multiplication and division of two negative numbers yielding a positive result here: http://mathcentral.uregina.ca/qq/database/QQ.09.99/butler1.html I was not fully happy with the explanation b/c I want to give me daughter a real-world example and I can't seem to find one. The following illustrates why multiplying negative numbers has become difficult to explain: 2 X 2 = 4 ----(-4)---(-2)---0---2---4 In this example we start with 2 and then want 2 more of them. When we move across the number line from 2 to our answer, which is four, we have moved only 2 units to the right. -2 X -2 = 4 ----(-4)---(-2)---0---2---4 In this example we start with -2 and then want -2 more of them. When we move across the number line from -2 to our answer, which is four, we have moved 6 units to the right. How can the phenomenon of multiplying two negative numbers being more powerful than multiplying two positive numbers be explained? -Brett Stephen La Rocque and Harley Weston lui répond.
	Multiplying and dividing by zero		2007-02-05
		colin pose la question : i would like to if u multiply 1,000,000 by 0 does it equal o or 1. if you have a number eg 15689 and you divide by o what would the answer be is it 1 Penny Nom lui répond.
	Which lets you put equal groups together?		2007-01-20
		Kathy pose la question : Which lets you put equal groups together? division, multiplication, subtraction, estimation Stephen La Rocque lui répond.
	Comparing two fractions		2007-01-18
		Kayla pose la question : Why does eight over twelve compared to one half work when you use cross multiplication. Penny Nom lui répond.
	Induction		2006-10-31
		Ross pose la question : Suppose that A and B are square matrices with the property AB= BA. Show that AB^n = B^n A for every positive integer n. Stephen La Rocque and Penny Nom lui répond.
	Lattice multiplication		2006-10-16
		Patti pose la question : I am a parent of a 5 th grader, and am a bit loss in the "new" math. I know how to multiply using the "old fashion" method. But, could you please explain lattice multiplication. Diane Hanson lui répond.
	Mayan multiplication		2006-04-16
		Marca pose la question : I'm researching the Mayans, and my advisor, Dr. McDonald, stated that you may know whether the Mayans knew how to multiply. I'm finding conflicting information on the internet, and anything you could provide would be greatly appreciated. Chris Fisher lui répond.
	Mastering the multiplication tables		2006-04-04
		Ellie pose la question : I need a detailed study plan fro helping my son master his multiplication tables. Grade: 3 elementary Paul Betts lui répond.
	Multiplier and multiplicand		2003-12-17
		Karen pose la question : The K-5 curriculum states that at a grade 5 level students should "understand and use the terms multiplier, multiplicand" The curriculum defines 'multiplicand' as " a number being multiplied by another number. A factor." There is no definition given for 'multiplier' Question: Define these words- are they just other words for 'factors'. If so, how important is it that students use these terms? It would seem like 'factors' would be the better choice of words to use. If multiplcand refers to eg. the first factor in the equation and the 'multiplier' the seond term, (if in fact it does)- is this not confusing for students when we teach them that multiplication is commutative? Penny Nom lui répond.
	The base 10 multipliction table		2002-07-07
		A student pose la question : These are two questions from Math for Elementary Teachers and they have me stumped. You have two coins that are worth 30 cents. One of the coins is not a nickel. What are the two coins? The product of the diagonals of any 2x2 matrix in the base 10 multiplication table are equal. Why? Penny Nom lui répond.
	For 7 the multiplicand is 143		2001-12-12
		Cory pose la question : For 7 the multiplicand is 143 I am asked to solve this, if you could help me it would be greatly appreciated! Penny Nom lui répond.
	Negative times negative is positive		2001-10-26
		Mary pose la question : I have a question about adding and multiplying positive and negative numbers. When we add two negative numbers the answer is negative BUT when we multiply two negative numbers the answer is positive. I don't understand. Why? Penny Nom lui répond.
	Conformable matrices		2001-08-05
		Wayne pose la question : Can someone explain the concept of conformable matrices in a way that is easy to understand ? One definition says to multiply matrices rows and columns must conform, ie, 5 x 3 matrix times a 3 x 5 matrix. In the next example, however a 8 x 1 matrix and a 8 x 3 matrix are said to be conformable! Steve Kirkland lui répond.
	Danging couples		2001-06-06
		Danielle pose la question : How many boy-girl dancing couples could be formed if 85 boys and 102 girls attend a school dance? Penny Nom lui répond.
	Multiplication		2001-05-30
		Lindsay pose la question : Who came up with multipling? its so easy Claude Tardif and Penny Nom lui répond.
	Your DJ Business		2001-05-30
		Linda pose la question : Your DJ Business has 6 rap, 10 rock, 6 alternative, 8 oldies, and 5 country CD singles. How many different 10-song sets can the DJ play, if she plays 2 singles from each category? and How many different 10-song sets if she plays exactly 3 rap singles and 4 rock singles in each set? Leeanne Boehm lui répond.
	Multiplying one and two digit numbers		2001-02-11
		Marty pose la question : When multiplying do you put the number you are multiplying by on the top or the bottom. Example if you are multiplying by 6's would you write the problem 6 x 2 or 2 x 6 Maybe it just doesn't matter. But when you get to double digits, the double digit always goes on the top? Penny Nom lui répond.
	What is wrong with these probelms?		2001-02-09
		Cindy pose la question : Hi, I am a planning on becomming a teacher and i am asked to find out what is wrong with these probelms and how i would go about showing a student what is wrong with them!! Error in patterns: 13/35=1/5; 27/73=2/3; 16/64=1/4 4/5+2/3=6/8; 2/5+3/4=5/9; 7/8+1/3=8/11 2/3*3=6/9; 1/4*6=6/24; 4/5*2=8/10 Leeanne Boehm and Penny Nom lui répond.
	Fractions of fractions		2001-01-30
		Katie pose la question : When you multiply two positive fractions less than 1, how does the answer compare to the size of the fraction? Why? Penny Nom lui répond.
	7x6 by doubling		2001-01-23
		A student pose la question : Can you think of a way to use doubling to multiply 6x7? Allen Herman lui répond.
	Multiplication of fractions		2001-01-08
		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.
	Order of operations		2000-11-26
		Margaret Pratt pose la question : My daughter has a math question and I am afraid I am of no help. Can you help? 2x5/2+1-5= She arrives at 8 as the answer and has been told this is incorrect. Any help you can give would be appreciated. Penny Nom lui répond.
	A complex calculation		2000-11-24
		Angie pose la question : Multiply (3-2i)2=32-2(3)(2i)+(2i)2 Penny Nom lui répond.
	Permutations and Multiplication Principle		2000-09-22
		Candice pose la question : A forester selects 4 pink and 4 white dogwoods. The trees are to be planted in row. If a tree is distinguished by color only, in how many ways can the eight dogwoods be planted? How many of these arrangements have at least two trees of the same color side by side? Denis Hanson and Claude Tardif lui répond.
	Why does division start from the left?		2000-05-24
		Salil Dave pose la question : Addition, subtraction and multiplications start with right most digit and proceed left, but division starts from left-most digits and goes right ... why? Harley Weston lui répond.
	Star-multiplication		2000-04-07
		Greg Potts pose la question : I have this question to answer and I don't know where to start. 1*9=0, 9*8=72 and 2*8=9, then 9*9 =? Penny Nom lui répond.
	Cross multiplication		2000-02-16
		J E Swinton pose la question : Why does cross multiplication work? How come canceling work? Penny Nom lui répond.
	towers of cubes		1999-10-05
		Sanker pose la question : I need help to solve this Rules for bulding towers of cubes rule 1 The number of cubes on the bottom layer is always one less than the number of squares on the grid rule 2 Each new layer is made with one cube less than the layer underneath it. Investigate how many different arrangements there are of 4 cubes on top of 5 cubes on a two by three grid investigate the number of different arrangements of six cubes on top of seven cubes on a two by four grid investigate the relation between the number of arrangements of cubes and the size of the grid when there are two layers of cubes when there are more than two layers of cubes Walter Whiteley lui répond.
	Duplation method of multiplication		1998-11-26
		Sara Whitford pose la question : I am wondering why 16 and multiples of 16 do not work in the ancient duplation method of multiplication used by the Egyptians. I discovered the method in the Journeys math text gr 7 level. Just curious. Am I doing something wrong?? Jack LeSage and Harley Weston lui répond.
	A Number Trick		1998-10-26
		Brenda Meagher pose la question : I'm a 37 year old mother and i have returned to school for personal reasons. I was faced with this question. Choose any number less than 10, multiply it by 8547, then take your answer and multiply it by 13. I chose the number 8. 8547 x 8 -------- 68376 and 68376 x 13 --------- 205128 68376 --------- 888888 Any number chosen from 1 to 9 will result in the same form of answer.If the number two is used you will end up with 222,222.etc So my question is, is there another number that will results in the answers. Harley Weston lui répond.
	Roman Numerals		1997-10-31
		Mark Curts pose la question : I am looking for some resources for teaching Roman Numerals. I would like to expand upon the basic concepts, by locating some addition, subtraction, multiplication or division problems written with Roman Numerals. -- Mark Curts Chris Fisher lui répond.
	Priority of operations		1996-11-04
		Wallace pose la question : What is the answer to this problem? Let x=-2 and y=3. Evaluate 12x / 2y (if the old division sign is used). Chris Fisher lui répond.

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