Posted by **Deb** on Friday, January 9, 2009 at 7:55pm.

Simplify: -5^3 -3

-125 -3 = 122 correct?

- Math 115 24 -
**Damon**, Friday, January 9, 2009 at 8:00pm
No, on two counts

-125 + 3 = -122

-125 - 3 = -128

- Math 115 24 -
**Ms. Sue**, Friday, January 9, 2009 at 8:02pm
-5 * -5 = 25

25 * -5 = -125

-125 -3 = -128

- Math 115 24 -
**Damon**, Friday, January 9, 2009 at 8:02pm
Look at what you are doing on a number line, negative is left. More negative is more left.

- Math 115 24 -
**Damon**, Friday, January 9, 2009 at 8:05pm
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.

- Math 115 24 -
**Nabiha**, Saturday, January 10, 2009 at 10:36am
i think -125-3=-128

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