An elevator on the 10th floor goes down 9 floors. Then it goes up 29 floors, down 3, and finally down 12. What floor does it end up on? Write an equation to show how you found your answer
really? Never rode in an elevator? Can't add and subtract?
f = 10 - 9 + 29 - 3 - 12
f = 15
The elevator ends up on the 15th floor.
This equation shows that we start at the 10th floor, then go down 9 floors (10 - 9), then go up 29 floors (- 9 + 29), then go down 3 floors (- 9 + 29 - 3), and finally go down 12 floors (- 9 + 29 - 3 - 12). The resulting number, 15, represents the floor the elevator ends up on.
To find the floor where the elevator ends up, we need to keep track of its movement step-by-step.
Step 1: The elevator goes down 9 floors from the 10th floor, which means it ends up on the 10 - 9 = 1st floor.
Step 2: From the 1st floor, it goes up 29 floors, so it ends up on the 1 + 29 = 30th floor.
Step 3: Next, it goes down 3 floors from the 30th floor, so it ends up on the 30 - 3 = 27th floor.
Step 4: Finally, it goes down 12 floors from the 27th floor, so it ends up on the 27 - 12 = 15th floor.
Thus, the elevator ends up on the 15th floor.
To represent the steps above in an equation, we can use the following:
Starting floor (10th floor) - 9 + 29 - 3 - 12 = Final floor (15th floor)
To find the final floor the elevator ends up on, we can use a simple equation.
Let's start with the starting floor, which is the 10th floor. From there, the elevator goes down 9 floors, so we subtract 9 from the current floor number: 10 - 9 = 1.
Next, the elevator goes up 29 floors. So, we add 29 to the current floor number: 1 + 29 = 30.
Then, it goes down 3 floors. Subtract 3 from the current floor number: 30 - 3 = 27.
Finally, the elevator goes down 12 floors. Subtract 12 from the current floor number: 27 - 12 = 15.
Therefore, the elevator ends up on the 15th floor.
To summarize, the equation to find the final floor is:
Starting floor - 9 + 29 - 3 - 12 = Final floor
Plugging in the starting floor of 10:
10 - 9 + 29 - 3 - 12 = 15