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

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

Children use their addition knowledge to complete equations in a race to reach the sunken treasure.

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

Players hone their two-digit addition skills as they match equations with their missing addends!

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

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

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

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

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

Learners hone their two-digit by one-digit addition skills in this underwater race to sunken treasure!

Kids practice matching each addition equation to its missing factor in this interactive math game.

Children practice addition within 10 in this water rafting adventure!

Build up second graders’ math knowledge with a diving game about three-digit addition.

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

Help young learners identify the correct fact family equations in this exciting addition game.

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

Ask your child to practice adding up to 10 and breaking down math equations in this math race.

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

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

Take a deep dive into the addition strategy of adding one more with this underwater math adventure!

Hone first grade addition strategies with this underwater math adventure!

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

To help Roly move through obstacles, kids learn a regrouping strategy to make addition within 20 easily!

In this water rafting adventure, children will be asked to choose the equation that adds up to 10.

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

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

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

Get ready to add 10 more! Analyze expressions like "110 + 10" and calculate three-digit sums.

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