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

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

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

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

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

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

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

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!