Fill in these addition facts! This game challenges kids to match missing addends to each equation.

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

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

Kids hone their single-digit addition skills as they match equations with their missing factors.

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

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

Children must choose the correct addition expressions as they race to the sunken treasure chest.

Children complete a race by choosing the correct addition expressions for the given fact families.

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