Eliminate memory overload and learn eight math facts per card! Triangle Flash Cards teach the family of facts, showing the relationship between multiplication and division. Example: 8 x 9 = 72, 9 x 8 = 72, 72 ÷ 8 = 9, and 72 ÷ 9 = 8. 120 math facts are shown on 20 cards. 2 players.