Suppose that the elevator starts at street level (0), goes down 2 floors, then goes up 5 floors, and finally goes down 3 floors. On which floor would the elevator be?
Floor 0
0
+-2
+5
-3 you would add this up and come up to elevator landing on floor 0 back where you started
To determine which floor the elevator would be on, we need to calculate the net change in floors. Let's break down the movement of the elevator step by step:
1) Starting at street level (0).
2) Going down 2 floors: This means the elevator will be on the negative 2nd floor.
3) Going up 5 floors: Since we were on the negative 2nd floor and moved up 5 floors, the elevator will be on the 3rd floor.
4) Going down 3 floors: From the 3rd floor, going down 3 floors would result in the elevator being on the 0th (ground) floor.
Therefore, the elevator would be on the 0th (ground) floor.