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

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

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

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

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

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

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

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

Help Roly get to the party on the other side of the river by solving addition word problems!

Give learners plenty of practice solving addition word problems with this math game!