This activity can be used in two ways:
Quiz-Quiz-Trade: Fold answers over to create 2-sided cards with the problem on the front and corresponding answer on the back. Give each student a card and have them complete the problem. After they have checked their answer, they will find another student and "quiz" them using that problem. After both students have answered each other's problems correctly, they will trade cards and find a new partner.
Matching Activity: Cut answers and problems apart prior to class and shuffle. Have students match correct answers to the original problems.
I would laminate to keep cards fresh for multiple uses!