Build math-fact fluency like never before! Familiar triangle format provides a visual cue, while game play makes addition and subtraction fun! Pass out the numbered playing cards then take turns filling in the missing spots to complete fact families. Be the first player to play all your cards, and call out "tri-FACTa"! Includes: triangle game board, 100 cards (facts up to 20) and 4 trays. For 2-4 players. Game board measures 10". Grades 1 and up.