| 1) | -751 + 910 = | 2) | -226 − 785 = | 3) | -477 + 437 = |
| 4) | 535 − 612 = | 5) | -673 + 218 = | 6) | -380 + 273 = |
| 1) | -751 + 910 = 159 | 2) | -226 − 785 = -1011 | 3) | -477 + 437 = -40 |
| 4) | 535 − 612 = -77 | 5) | -673 + 218 = -455 | 6) | -380 + 273 = -107 |