Children use their mental math skills to determine which equations add up to 20 in this math game.

How do you make 10? Dive into a math adventure and discover simple equations that add up to 10.

Find the sum of 12 plus 8 and other combinations that make 20 in this online diving adventure.

In this energizing math game, think about how different numbers can add up to 20.

Children race down the river and across the finish line by choosing the equations that make 20.