Question

Describe how to add the following addition expressions on a number line, 9 + (– 13) and –13 + 9. Then compare the sums.

Answer 1

1. 9+(-13)
= 9-13
=-4

2. -13+9
=-4

There is no difference.

Answer 2

Step-by-step explanation:

first we solve

1. 9+(-13)

= 9- 13

=-4.

second we solve

2. (-13) +9

= -4.

THERE ARE NO DIFFERENCE.