The 4th graders are writing equivalent fractions to add two fractions with respective denominators of 10 and 100 (4.NF.7). For example: 8/10 + 15/100 To play the game, students roll two die. The first dice tells them what tenths fraction to write down and then, they roll the second dice and that tells them what hundredths fraction to write down. Students add the two fractions and find the answer on the game board and cover it with a colored counter. The first student to get "Tic Tac Toe" (or three counters in a row) is the winner!