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

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.

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

Kids practice adding small numbers in this silly addition game.

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

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

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

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

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

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

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.

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

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

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