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

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

All aboard! Kids solve addition problems on a number line using 1, 10, and 100 unit manipulatives.

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

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

Counting and adding get served up in this game that challenges kids to add toppings to a giant pizza.

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

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

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

Kids mix up a potion to help Professor Beardo grow out his beard, and practice place value, in this multi-digit addition game.

Kids practice two-digit addition to 100 in this action-packed number line game.

Your kid will add the right number of eggs to the nest to practice addition facts.

Kids practice adding small numbers in this silly addition game.

What’s the sum? Add 10 to that number in a three-digit addition game for second graders.

Kids practice mentally adding sums up to 30 in this fast-paced addition race.

Kids try to match the equations that equal the same number in this online math game!

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

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

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

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

Math learners hone their multi-digit addition skills in this interactive game show!

As students practice adding one-digit numbers, they will move their character to the finish line in Ski Racer: Addition to 10.

Children practice addition within 10 in this water rafting adventure!

Kids solve a multi-step word problem by counting out the right number of coins.

Addition experts, come on down! Practice quick-thinking two-digit addition in this educational game that tests off-the-cuff adding skills.

Children will solve addition word problems in order to help Roly make it across the river!

Your kid represents addition facts with objects by counting Roly's hats.

Add it up! Kids must use mental addition to match each equation to its answer.

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

Match each addition fact to its answer in this online game!