| 5 - 5 = _____ | 9 + 9 = _____ |
| 1 - 0 = _____ | 7 + 3 = _____ |
| 4 - 1 = _____ | 16 - 5 = _____ |
| 14 - 5 = _____ | 18 - 3 = _____ |
| 11 + 8 = _____ | 11 + 0 = _____ |
| 13 + 0 = _____ | 15 - 5 = _____ |
| 5 - 4 = _____ | 7 - 2 = _____ |
| 9 + 3 = _____ | 3 + 3 = _____ |
| 5 - 5 = _____ | 15 - 12 = _____ |
| 7 + 7 = _____ | 20 - 10 = _____ |