ANSWER:-45 - 5 = -50
EXPLANATION:
When we subtract we move left down the number line and when we add we move right up the number line
..., -50 , -49, -48, -47, -46, -45 , ... , 0, 1, 2, 3, 4, 5, ...
We are at -45 on the number line
..., -50 , -49, -48, -47, -46, -45 , ... , 0, 1, 2, 3, 4, 5, ...
We want to subtract 5 so we move 5 numbers to the left
..., -50 , -49, -48, -47, -46, -45 , ... , 0, 1, 2, 3, 4, 5, ...
This puts us at -50 therefore -45 - 5 = -50