Addend + Addend = Sum is a bingo-type game designed for young children to develop their computational skills. So many times students are given the problem and asked to find the sum. In this game, the sum is given and students are asked to find the problem. This requires much more mathematical thinking on the part of the student as each one must check through the problems on his/her card to find a problem that will match the sum. There are 30 different cards with sums to 12.