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