| 1) | 400 + 179 = | 2) | 717 − 132 = | 3) | 918 − 910 = |
| 4) | 218 + 591 = | 5) | -650 − 303 = | 6) | -98 + 805 = |
| 1) | 400 + 179 = 579 | 2) | 717 − 132 = 585 | 3) | 918 − 910 = 8 |
| 4) | 218 + 591 = 809 | 5) | -650 − 303 = -953 | 6) | -98 + 805 = 707 |