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

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

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

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

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

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

Let's have a ski race while practicing addition to 20 in this fast-paced learning adventure!

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

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

Reinforce your child's three-digit addition skills with this ski-themed learning adventure!

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

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

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

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

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

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

Children will love racing to the finish line while boosting their addition and mental math skills.

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

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

Children use their knowledge of addition to snap pictures of unique dinosaurs in this fun math 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 will solve addition word problems in order to help Roly make it across the river!

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

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

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

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

Practice essential first grade addition skills in this river-themed math game!

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

Are you ready to add 10 to numbers over 100? Reinforce students’ learning in this ski-themed game.