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A lift starts at floor 0. It goes down 6 floors, then up 9 floors, then down 4 floors. What floor is the lift now?

Mathematics

ScanSolve AI Answer

Answer

-1

Step-by-step solution

4 steps

Here's the solution to the problem:

Section C: Word Problems

  1. A lift starts at floor 0. It goes down 6 floors, then up 9 floors, then down 4 floors. What floor is the lift now?
  1. The lift starts at floor 0.

  2. It goes down 6 floors, so the position becomes 0−6=−60 - 6 = -6.

  3. It then goes up 9 floors, so the position becomes −6+9=3-6 + 9 = 3.

  4. Finally, it goes down 4 floors, so the position becomes 3−4=−13 - 4 = -1.

    The calculation shown in your image is correct:
    $$
    -6 + 9 + (-4)
    $$
    $$
    = 3 + (-4)
    $$
    $$
    = -1
    $$
    The lift is now at floor $-1$.
    
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