| 20 - 5 = _____ | 11 - 6 = _____ |
| 18 - 3 = _____ | 16 - 5 = _____ |
| 19 - 1 = _____ | 14 - 14 = _____ |
| 16 - 7 = _____ | 15 - 15 = _____ |
| 11 - 5 = _____ | 20 - 8 = _____ |
| 10 - 3 = _____ | 20 - 5 = _____ |
| 18 - 2 = _____ | 18 - 13 = _____ |
| 19 - 12 = _____ | 13 - 12 = _____ |
| 10 - 7 = _____ | 20 - 3 = _____ |
| 16 - 14 = _____ | 12 - 1 = _____ |