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

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

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

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

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

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

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

Add one and find the sum! In this game, children practice number and pattern recognition skills.

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

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