How do you add and subtract integers?

Take a look at this post.  :)

http://web2.0calc.com/questions/it-just-doesn-t-make-sense-to-me

Ex. 7 + 5 = 12. Both are positive.

Ex. -7 + 5 = -2. One is negative and is a larger negative, so the answer is negative.

Ex. -7 - 5 = -12. Note that we can rewrite this as -7 + (-5) = -12.  We are actually adding two negatives so the answer is more negative.

Ex. -7 - (-5) = -2. Note, this is the same as -7 + 5 since double negatives = a positive. 

 

Positive + positive = greater positive

Negative + negative = greater negative

Negaitve - negative = if the second negative is greater, then the answer will be positive. If the first number is the greater negative, then the answer will be negative. 

 

Happy adding/subtracting!