how do i add -7+3 using a line number

Question

what are the procedures in adding -7+3 using a line number

Answer 1

Negative numbers move left, positive numbers move right.

1. Start at 0
2. For -7, move 7 places to the left of 0 (to -7)
3. For +3, move 3 three places to the right of -7
4. You should end up at -4