The Missing Addends is a 2-player game in which students practice identifying the missing addend to make the addition problem true. Students roll a die to determine the number for the missing addend. Then they search the game board to find the addition problem that requires the addend rolled before placing a counter on it. The first student to get five in a row - vertically, horizontally, or diagonally - wins the game. A great activity to whole for whole group or math centers. This product comes with 2 different game boards to help differentiate. The first game board contains sums through 13. The second game board contains sums through 20. This activity meets or exceeds the Common Core Standards in Mathematics and helps to expose students to algebra.