| 1) | -515 − 630 = | 2) | -666 + 87 = | 3) | 277 + 228 = |
| 4) | -282 + 213 = | 5) | 169 − 741 = | 6) | 626 − 951 = |
| 1) | -515 − 630 = -1145 | 2) | -666 + 87 = -579 | 3) | 277 + 228 = 505 |
| 4) | -282 + 213 = -69 | 5) | 169 − 741 = -572 | 6) | 626 − 951 = -325 |