Math+Op is a card game based on math problem solving together. Each players have number cards. Players choose a rulesmaker at first. Each person get one card from number card deck. Player who gets big number is rulesmaker. Rulesmaker gives ten card at a time face down, beginning with the player on the right. Each player gets 10 cards but rulesmaker 11 cards. The remaining number cards and operations cards are placed face down separately on the table, forming the stock. Rulesmaker placed at first number card. Player at right of rulesmaker gets number or operation card from stock and placed. Player who placed result number card is winner.