Hi! Your apartment building is so cool! How did you decide where to put your apartment?
Well, I chose to put my apatment on the 10th floor because I want to be in the middle of everything with easy access to my daily trips.
I chose to put my apartment on the second floor because I like to be near everything. The bowling alley is six floors below me, so it is at -6. The batting cage is 3 floors above me, which means it is at +3. The movie theater is 7 floors above me, which means it is at +7. Finally, the lobby is 10 floors below me, so it is at -10.
Since my apartment is on the 10th floor, I need to go down 10 floors to end up at the lobby. If my apartment building was on a number line, I would consider my apartment building at zero. So, you would do 0 + -10 = -10, making the lobby 10 floors below me.
4 & 5)
4) I wanted to go bowling with you yesterday but I couldn't find you. I walked up ten floors from the lobby to check your apartment. You weren't there so I walked down six more floors to check the bowling alley, and you weren't there either, so I gave up. I walked a total of 16 floors. |10| + |-6| = 16
5) Oh, sorry! I was enjoying the view from the roof. If you needed me, you would just have had to go up 16 more floors from the bowling alley.
Today I hope to watch a movie in the theater and then play a quick game of bowling at the bowling alley. First I will have to walk up 7 floors from my apartment to arrive at the movie theater, and then I will walk down 13 floors from my apartment to get to the bowling alley. I will be at 7 + (-13) = -6. this makes my final position 6 floors below me at the bowling alley.
Hey! Do you want to hang out and watch a movie? It's only 7 floors above you.
Sure, but I think I left my phone at the bowling alley. So I will go down 6 floors, find my phone, and then come back up 13 floors to the theater. So, I will go -6 + 13 = 7. So, I will be seven floors above my apartment.