Question

An elevator went up 15 floors, down 9 floors, up 11 floors, and down 19 floors. Find the net change.

Answer 1

Answer: the net change is 1 floor

Solution:
Let’s say that the start floor is x then x + 15 - 9 + 11 - 19 = x - 1

The net change is 1 floor.

Answer 2

The net changed 2 floors down

Explanation:

That should be your answer