This product has 30 adding and subtracting integer cards. The student or teacher cuts the cards apart. The student sorts them into Addition problems and Subtraction problems. The student uses the "Keep - Change - Change" phrase that changes a subtraction problem into "adding the opposite" problem.
Colored tiles or pieces of paper are used to represent -1 and 1 to help evaluate the problems. The student writes the answer to the problems on the cards.
This product was created by Susan M. Walker.