Mathematics - Addition and Subtraction - Subtraction within 10 - Subtraction Invaders
Aliens descend showing subtraction expressions (9-4, 7-2, 6-6, etc.). The student's ship shows a number (the answer). They must shoot ONLY the aliens whose expression equals their ship's number. For example, if ship shows '5', shoot '8-3' and '7-2' but not '9-3'. After hitting 3 correct aliens, the