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

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

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

Children hone their knowledge of addition and missing addends in a race to reach the sunken treasure.

Kids practice adding and taking away 10 in this silly game show.

Kids practice addition and subtraction with manipulatives in this silly shopping game.

Children flex their mental math muscles as they try to quickly find the equations that add up to 10.

First graders match the cards that equal the same value in this mental math matching game.

Kids help Elliott prepare treasures for her museum by answering word problems by using a tape diagram.

Kids click on bubbles that add up to 10 to try to keep the bubbles from overflowing.

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

Kids must move fast to find addition pairs that total a target sum within 20.