Addition: 100 Problems 5 + 9 5 + 8 5 + 7 5 + 6 6 + 8 6 + 7 6 + 6 7 + 7 7 + 6 8 + 6 Subtraction: 80 Problems 14 - 9 14 - 8 14 - 7 14 - 6 13 - 8 13 - 7 13 - 6 12 - 7 12 - 6 11 - 6 Total: 180 problems, with answer key