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Defend yourself from the invading spaceships by. Addition facts to 12 standards:. Web alien addition is a math game that helps students learn addition facts. Web test your math skills in addition, subtraction, multiplication and division — or pick the mixed category and try some of each. Play alien addition at math playground! To play this free math game, fire at the equation that makes the answer seen. Practice addition facts in this. Defend yourself from the invading spaceships by. Click on game name and then click. Web alien addition is a math game that helps students with learning addition using an alien invasion theme. Web math games / alien addition alien addition blast alien invaders to practice your addition!