SUBTRACTION SLAM! is a great card game to practice basic SUBTRACTION facts to 18.
Setup: Copy on cardstock/tag board, laminate, and cut out each card (each card has a SUBTRACTION fact and a DIFFERENCE).
Pass out all of the cards to the players. Player 1 chooses a card to play first and then everyone will solve the SUBTRACTION fact. The person who has the DIFFERENCE will SLAM it down, then continue by looking at the next SUBTRACTION fact and so on... The player who SLAMS down all their cards first wins! Shuffle and play again!