| 1) | 301 + 155 = | 2) | -503 − 811 = | 3) | -348 − 771 = |
| 4) | -859 − 236 = | 5) | -956 − 536 = | 6) | 673 − 12 = |
| 1) | 301 + 155 = 456 | 2) | -503 − 811 = -1314 | 3) | -348 − 771 = -1119 |
| 4) | -859 − 236 = -1095 | 5) | -956 − 536 = -1492 | 6) | 673 − 12 = 661 |