The first student secretly sets up an equation for student two. Student one rolls one die and places it on top of a margarine tub and chooses a card with a number higher then the number on the die. This student determines the missing addend and places the die with this number up under the tub. Student two looks at the die on top of the tub and the playing card and tries to determine the value of the hidden die. If the correct answer is given, players reverse roles.
Players collect a point each time they give a correct answer or stump an opponent.
The first player to score ten points is the winner. In a related game, students find the missing number in subtraction equations and play a similar game with the added variation of speed. ENC does NOT distribute this resource.