Math 115 24
posted by Deb .
Simplify: 5^3 3
125 3 = 122 correct?

No, on two counts
125 + 3 = 122
125  3 = 128 
5 * 5 = 25
25 * 5 = 125
125 3 = 128 
Look at what you are doing on a number line, negative is left. More negative is more left.

Oh, I bet I know what caused the confusion:
If you multiply or divide two negative numbers you change the sign to positive.
HOWEVER
That does not happen when adding. 
i think 1253=128