| 1) | -723 − 518 = | 2) | 506 − 736 = | 3) | -988 − 553 = |
| 4) | -230 + 847 = | 5) | 640 − 69 = | 6) | -955 + 211 = |
| 1) | -723 − 518 = -1241 | 2) | 506 − 736 = -230 | 3) | -988 − 553 = -1541 |
| 4) | -230 + 847 = 617 | 5) | 640 − 69 = 571 | 6) | -955 + 211 = -744 |