This is the traditional memory (concentration) card game used to reinforce double facts 0 - 10. Also included are Doubles Plus 1 and Almost Doubles (doubles plus 2).
Each of the three games has 22 cards - 11 equation cards and 11 answer cards.
All cards have a match (pairs).
Turn all cards facedown
Each turn, two cards are flipped over.
If the cards do not match, they are both turned back face down.
If the cards match, they are kept by the person who made the match.
Person with the most pairs wins!