Our skill-building, easy-to-play game makes learning math funiving students the practice they need to master subtraction facts through 20! Kids simply roll the 10-sided die and match the number to a problem on the board, placing a counter on the problemnd umping other players' counters as they go! The first player to use all their counters wins! You get a game board, 40 problem cards at two levels, 2 card storage pockets, 20 counters, a 10-sided die and 2 answer cards. For 2-4 players. Game board measures 12" x 12". Develops skills in subtracting within 20.