| 1) | 824 − 383 = | 2) | 571 − 57 = | 3) | 51 − 252 = |
| 4) | -931 + 786 = | 5) | 623 + 654 = | 6) | -475 − 396 = |
| 1) | 824 − 383 = 441 | 2) | 571 − 57 = 514 | 3) | 51 − 252 = -201 |
| 4) | -931 + 786 = -145 | 5) | 623 + 654 = 1277 | 6) | -475 − 396 = -871 |