Question

A dolphin is swimming 20 feet below the surface. It descends another 10 feet before rising 2

feet. How far below the surface is it now? {Show the number sentence.

Answer 1

28 feet

Explanation:

20 + 10 = 30 - 2 = 28 feet

The dolphin is 20 feet below the surface, goes down another 10 feet, so 30 feet below the surface, and raises two feet, so 28 feet below the surface.