Let's do more:

-3 + 7 =

press the purple "play" button to start the car

Here it is on the number line:

Number line showing the work for -3 + 7 = 4

-3 + 7 = 4

One more:

-8 + 6 =

press the purple "play" button to start the car

Here it is on the number line:

Number line showing the work for -8 + 6 = -2

-8 + 6 = -2


Try it:

Do these on a number line:

5 + -7 =

-3 + 6 =

-9 + 4 =

8 + -1 =