Tom swam to the bottom of a swimming pool that was 9 feet deep and he touched the bottom. He swam back to the surface. How many feet did Tom swim?

18 feet

Reason: he swam 9 feet going down the pool, but he didn’t just stay under there, he swam back up to the surface.
Thus we can 9 (feet for swimming to the bottom) plus 9 ( feet for swimming to the top).
In mathematical term we can say this in two ways.
9 + 9 = 18
Or
9 x 2 = 18

put like terms together.orremember that the 45 becomes negative when moved to the other side.orthe minuses cancel out.