| 1) | 174 − 912 = | 2) | -778 − 140 = | 3) | 82 + 150 = |
| 4) | -911 − 910 = | 5) | 926 − 202 = | 6) | -712 + 797 = |
| 1) | 174 − 912 = -738 | 2) | -778 − 140 = -918 | 3) | 82 + 150 = 232 |
| 4) | -911 − 910 = -1821 | 5) | 926 − 202 = 724 | 6) | -712 + 797 = 85 |