Students can practice their subtraction facts in this simple but fun game. I suggest 2 to 5 players. Kids sit in a circle and place cards face down in the center. One at a time, each student chooses a card, reads the problem and gives the answer. If they are correct they keep the card but if they're incorrect they put it back in the pile. When they draw a buzz card they have to put all their cards back into the pile. The person with the most cards at the end of the game wins.