Here's a fun game to practice subtraction facts.
Directions: Cut apart cards and lay them face down in a pile. Take turns turning over a card and solving the fact. (Both partners solve the problem and agree on the answer.) If you solve the problem correctly on your turn, keep the card. If you solve it incorrectly, return it to the bottom of the pile. The person who gets the most cards at the end of the game wins. If you draw a “skunked” card, return all your cards to the bottom of the deck.