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integers

Adding integers =

The sign of the larger number is the sign of the answer.

+2 plus -82 = -80

Subtracting integers

Is the same as adding its opposite

-8 - +6

-8 + -6 = -14

dog and cat method:  http://www.youtube.com/watch?v=27CJH60xwuA

 

Multiplying  and Dividing Integers

like signs are positive

different signs are negative

In other words, if the two integers have a different sign, then the product is negative,otherwise it's positive.

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