| 1) | 839 − 887 = | 2) | -815 + 167 = | 3) | -352 + 428 = |
| 4) | -298 − 326 = | 5) | 19 − 54 = | 6) | -44 + 978 = |
| 1) | 839 − 887 = -48 | 2) | -815 + 167 = -648 | 3) | -352 + 428 = 76 |
| 4) | -298 − 326 = -624 | 5) | 19 − 54 = -35 | 6) | -44 + 978 = 934 |