About This Lesson
Put aliens into the beam to reach the total on the spaceship. If correct and you press check, the spaceship will fly away with the aliens. Great for practicing speedy mental addition in a problem solving context! Is it best to use smaller numbers to make big ones? Why does it get trickier at the end? You can click to abandon the spaceship if the remaining aliens don't add up!
Patriciaw56, You are correct if the flying saucer flies away. It won't fly away if the answer is wrong.