Where were you? I had to walk up 16 floors down from your apartment and then 10 floors down. I walked a total of 26 floors. |-16| + |-10| this results to 16 + 10= 26.
But, I was in the roof you just needed to walk 0 + 35= 35. In which you needed to walk only 35 floors up.
Today I am planning on going to the gym and then the pool. I would have to walk 16 floors up to the gym and then 44 floors down to the pool. I would be at -16 + -44= -28. In which, I would be 28 floors underneath me at the pool.
Want to come over to my apartment today? I only live 8 floors above you
Sure. I just forgot my phone in the gym. So I am going 16 floors up to the gym and then I will come down 8 floors to get to you. So I will go 16 + -8= +8. Therefore, I will be 8 floors above my apartment.