24® Game Classroom Activities

Activity—Variations Editions used: Integers

To practice addition and subtraction of integers, give each student in the class an Integers card. Students begin by choosing a number then adding all four numbers clockwise around the circle.

Example:

1 + –5 = –4
–4 + –1 = –5
–5 + 6 = 1

To increase the difficulty, have students experiment by working counterclockwise, beginning with a different number or using other operations.