Dive for treasure and missing factors in this online game featuring addition equations.

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

Which equation makes 10? Help young mathematicians figure it out in this treasure diving math game.

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

Compose numbers to make 20 and build first grade addition skills in each round of this online game.

Which equation looks right? Review fact families and addition to 10 in this educational math game.

Think about how numbers are related in this interactive game about addition fact families.

Which number is missing? Click on the number that fits each addition expression and win the race.

In this water-themed race, first graders use math and logic to fill in each addition equation.

Only your kid's addition skills can help Secret Agent Floyd defeat the evil El Gato.