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Word Problems

Browse Elementary Multiplication
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Multiplying by 1 [09/01/1998]
Why doesn't a number change when you multiply it by 1?

Multiplying by 1000 [03/10/1997]
What is 2,542 times 1,000?

Multiplying by 11 [09/16/1997]

Multiplying by a Decimal [11/10/1994]
How come when you multipy 0.36 and 88 you get 9.4270, which is less than what it should be?

Multiplying by Nine [01/10/1997]

Multiplying by Zero [03/01/2002]
Why does any number times zero equal zero?


Multiplying Decimals and Decreasing Answers [12/02/1998]

Multiplying Fractions [01/20/1997]

Multiplying Huge Numbers [5/9/1996]
8541 * 4372 = 37340252 - How can I check my answer?

Multiplying Mixed Numbers [06/02/2003]
Can you multiply mixed numbers without changing them into improper fractions?

Multiplying Mixed Numbers [04/06/2004]

Multiplying Negative Integers [11/07/2001]
Multiplying negative integers by breaking each negative number into a positive number multiplied by -1.

Multiplying Negatives [1/13/1995]
An adult ponders his elementary school lessons of multiplication and negative numbers. We can rewrite -2*3 as -2 + -2 + -2, but how can we re- write -2 * -3?

Multiplying Sets [11/28/1994]
If you are multiplying three sets of 8 do you write the problem 3x8 or 8x8?

Multiplying Small Numbers [6/15/1996]
I don't know what 6 times 6 is.

Multiplying Two-Digit Numbers [06/04/1998]
Can you show me how to multiply two-digit numbers like 39 x 98?

Napier's Bones [01/20/1997]
How do you use Napier's Bones to do multiplication?

Napier's Rods [03/05/1999]
How do Napier's bones work?

Negative Two Kids [09/27/2002]
Let's say 3 x 2 = 6. Three is how many kids there are in a 'group.' Two is how many 'groups' there are, and six is the answer. Now let's say 3 x (-2) = -6. How can you have negative two 'groups' of three kids?


Number Properties [01/26/1998]


Numbers Bigger Than 12 [03/22/1997]
How do you do problems like 14 x 7?


Ordering the Operations [11/10/1998]

Order of Digits in Multiplication [03/27/2001]
Why do we learn to multiply starting with the least significant digits in the ones place, instead of starting with the larger place values?

Order of Operations [01/25/1998]

Order of Operations [8/21/1996]

Order of Operations and Fractions [02/22/2002]




Paperless Multiplication [07/23/2002]
How can I do two-digit multiplications (e.g., 99*98) without having to use paper?

Parts of a Subtraction Problem [04/09/2001]

Properties, Defined and Illustrated [10/10/2001]

Proving That (-1) * (-1) = 1 [01/30/2006]
At the high school level it is difficult to prove that -1 x -1 = 1. Is there a published proof somewhere that is appropriate for kids that age?

Rapid Multiplication ... Diagonally? [02/24/2010]
Doctor Vogler describes the "accumulator" method for finding products of two multi-digit terms, then works through an example.

Rectangular Arrays to Teach Multiplication [11/10/1994]
I teach fourth grade math. Are rectangular arrays the best way to teach multiplication?

Russian Peasant Multiplication [08/19/1997]
I have a project to do on "Russian" or "peasant" multiplication.


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