AddingGame.net has free online adding games to help kids and adults to improve their addition and subtraction skills. The games on this site are arcade style space shooter games similar to Space Invaders, but with a catch. In order to destroy the alien space ships, the player has to type the answer to a math problem on their keyboard. on the beginner difficulty, the space ships move slow and the addition problems are simple to solve. On more challenging difficulty levels, the aliens come faster and in larger numbers. Also the numbers the player must add or subtract get larger and more challenging. If you have an educational website or blog, please feel free to embed our game on your site.