How would you use the number line to do the following calculation?

-2 + 3

Start at 3, then move right 2

Start at 2, then move left 3

Start at -2 then move left 3

Start at -2, then move right 3

The first number in this expression is -2, so we start here. We next have to add 3, so we move right on the number line 3 units.