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

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

Kids solve two- and three-digit addition problems by regrouping in order to help the Professor grow out his beard.

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

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

Students help Birdee and Cuz-Cuz count up all the fish they won in this addition game.

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

Children practice addition within 10 in this water rafting adventure!

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

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

Children practice adding two-digit and one-digit numbers to dig up fossils in this math game.

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

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

Kids add to different target numbers, and must be quick; the balls are dropping fast!

First graders gain confidence with addition and decomposing numbers in this fun water rafting game!

Kids sharpen mental addition skills with this silly construction math game.

Add 100 to three-digit numbers and find the matching sums in this exciting Dino Fishing game.

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

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

Practice two-digit addition and adding multiples of 10 in this Dino Fishing math game.

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

Children dig up dinosaur fossils by adding 10 to multiples of 100 in this prehistoric game.

Help second graders learn about addition facts to 20 in this online matching activity.

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

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

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

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

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

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

Kids practice adding small numbers in this silly addition game.