Cool math Pre-Algebra Help Lessons: Signed Numbers (Integers)

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Coolmath Pre-Algebra
Signed Number (Integers) lesson 9 - Multiplication
(page 4 of 7)
---- This pre-algebra lesson explains how to multiply signed numbers (integers).

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What if we multiply two negative numbers?

-3 x -4 =

Whoa... Did I just hurt your head with that one?

No worries. It's easy!

You're good at figuring out patterns, right?

Check this out:

-3 x 4 = -12 ... -3 x 3 = -9 ... -3 x 2 = -6 ... -3 x 1 = -3 ... -3 x 0 = 0 ... -3 x -1 = __ ... -3 x -2 = __ ... -3 x -3 = __ ... -3 x -4 = __ The answers are increasing by 3 each time. (They are getting bigger by 3 each time!)

Can you figure out what goes in the blanks?

Continued on the next page

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