When multiplying integers with the same value (+or-) (-2)x(-2) the product will always be positive.

When the value of the integers of (+,-) (+2) x(-3) The product is always negative

Sign rules cont'd

(+4)x(-2)x(-1)=

8 x (-1)=+8

When you have even amount of (-) signs the product is Positive

When there are an odd number of (-) signs the product is negative

http://www.mathgoodies.com/lessons/vol5/multiplication.html

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Good job explaining the rules, you should also add a picture to show how it works, maybe something like- (+2) x (+4) = +8

ReplyDelete(+2) x (- 4) = -8

(- 2) x (+4) = -8

(- 2) x (- 4) = +8

Something like that so it's easier to understand your explanation, but good job!