1 answer
(click or scroll down)
Lucy's starting point is 3 floors below ground, which is the equivalent of a negative 3 floor. Her office is on the 10th floor above ground, which is the equivalent of a positive 10 floor.
To find the number of floors she needs to go up from her car to her office, we can subtract Lucy's starting point from her office floor using an absolute value:
|10 - (-3)| = |10 + 3| = |13| = 13
Therefore, Lucy needs to go up 13 floors from her car to her office.