Question

a diver takes a dive in the red sea. He initially descends 100 feet. Then rises 28 before descending another 33. What is his final position

Answer 1

Descending: subtraction

Rises: Addition

The diver descends 100ft: Position -100 (the 0 is the sea level)

Then rises 28: Add 28 to the previous position: Position -72

`-100+28=-72`

...before descending another 33: Subtract 33 to the previous position:

`-72-33=-105`

Then, the final position is -105ft (105 ft under the sea level)