Woah! Your apartment looks very modern! What floor did you put your apartment on?
I decided to put my apartment on the 8th floor because 8 the luckiest number in China since the pronunciation sounds similar to "Fa", which means wealth, fortune, and prosper.
I put my apartment on the 8th floor because it's my lucky number. My friend's apartment is 5 floors above me so it's +5. The gaming room is 8 floors above me so it's positioned at +8. The cafe is 5 floors below my apartment so it is positioned at -5. The library is 10 floors above me so it is positioned at +10.
Because my apartment is located on the 8th floor, I need to walk down 8 floors to reach the lobby. If my apartment is basically the origin, that would mean 0+-8=-8. The lobby is 8 floors under me.
I feel like relaxing right now. Maybe I should head to the gaming room! I'll walk up 6 floors from my apartment and then 1 floor down. |6| + |-1| means 6+1=7, so I've walked 7 floors in total.
How'd I end up here? I must have forgotten where the gaming room is!
The gaming room is on the 16th floor. Can we go to the roof? There's supposed to be a meteor shower tonight and I want to see it! To get to the roof, we have to walk 0+12= 12, so 12 floors up.
Today's a nice day for reading a book! I'll grab some tea from the cafe as well. To get to the library from the cafe, I'll have to walk 5 floors up to get to my apartment and then 18 floors up. The total amount of floors I've walked is -5+18= 13 floors. I will be at the library which is 13 floors above the cafe.