| 1) | -337 + 959 = | 2) | 18 + 674 = | 3) | -598 + 395 = |
| 4) | 172 − 372 = | 5) | -820 + 550 = | 6) | -581 − 909 = |
| 1) | -337 + 959 = 622 | 2) | 18 + 674 = 692 | 3) | -598 + 395 = -203 |
| 4) | 172 − 372 = -200 | 5) | -820 + 550 = -270 | 6) | -581 − 909 = -1490 |