Question

How do you use a number line to show hat -4+3 and 3+ -4 have the same value

Answer 1

Using a number line

-4  -3  -2  -1  0  1  2  3  4

If you take -4+3 you would find -4 and add 3, so you get closer to the positive numbers.
-4+3=-1
If you take 3+-4 you would subtract because when adding a positive to a negative you would ignore the + sign and subtract instead.
3+-4=-1