| 10 - 10 = _____ | 10 - 1 = _____ |
| 17 - 6 = _____ | 14 - 1 = _____ |
| 12 - 2 = _____ | 13 - 10 = _____ |
| 15 - 0 = _____ | 12 - 7 = _____ |
| 14 - 7 = _____ | 10 - 1 = _____ |
| 14 - 12 = _____ | 12 - 4 = _____ |
| 20 - 3 = _____ | 13 - 11 = _____ |
| 16 - 9 = _____ | 14 - 11 = _____ |
| 19 - 15 = _____ | 11 - 3 = _____ |
| 20 - 4 = _____ | 15 - 14 = _____ |