| 8 - 1 = _____ | 13 + 1 = _____ |
| 5 + 4 = _____ | 1 + 5 = _____ |
| 16 - 8 = _____ | 15 - 0 = _____ |
| 20 - 18 = _____ | 20 - 7 = _____ |
| 20 - 5 = _____ | 19 + 0 = _____ |
| 10 - 0 = _____ | 7 - 5 = _____ |
| 11 + 5 = _____ | 12 + 0 = _____ |
| 14 + 2 = _____ | 6 + 5 = _____ |
| 10 - 4 = _____ | 6 - 1 = _____ |
| 16 + 4 = _____ | 20 - 13 = _____ |