Addition & Subtraction Game 

Are you looking to work on both your addition and subtraction skills in the same game. Play Addition Aliens Attack and increase your ability to add and subtract quickly. This game is similar to Adding Aliens, which can be found on our site's home page. Just like in Adding Aliens, you have four different levels of play, Beginner, Intermediate, Advanced, and Impossible. If you are learning and new to addition and subtraction, the Beginner difficulty is probably right for you. If you are very good and would like to see how quickly you can add and subtract numbers, try the Impossible difficulty level and see if you can keep up with the swarms of aliens.