This printable card game is a fun way for students to practice their basic addition and subtraction facts to 20. The theme is medieval knights and castles. Card game can be played a variety of ways. It was designed to play as a match game, but can also be played just like GO FISH or even the game of WAR. These can also be used as flash cards. Copy them on cardstock or heavy paper and use them all year long. Great for students just learning their facts and for those that need reinforcement or repetition to help them memorize facts they will need to be successful. There are a total of 56 addition and subtraction problems/answers.