What is a negative + positive number? Example -5+3=

Guest Sep 10, 2017

edited by
Guest
Sep 10, 2017

edited by Guest Sep 10, 2017

edited by Guest Sep 10, 2017

#1

#3**+2 **

So, I'll do a few examples.

Ex 1: -5+3=?

Because the Commutative Property of Additon states that a+b=b+a (ex: 3+7=7+3), we can reorganize the statment.

So, -5+3 could also be 3+(-5) or 3-5.

Then, do simple math.

3-5=-2

Ex 2: -3+9=?

Use the Commutative Property of Addition again.

-3+9 is also 9-3.

More simple math.

9-3=6

AdamTaurus
Sep 10, 2017

#5**+2 **

Thanks Adam,

Here NinjaDevo gave a wonderful answer for 3-6

I pulled this straight out of our **sticky notes** under "**Great answers to learn from**"

So with any addition or subtraction you

1) start on the number line at the first number.

2) Go left if you are subtracting (just like NinjaDevo did)

3) Go right if you are adding

Melody Sep 10, 2017