| 1) | -570 − 117 = | 2) | -451 + 978 = | 3) | 221 + 480 = |
| 4) | 463 − 162 = | 5) | -321 − 643 = | 6) | -507 + 427 = |
| 1) | -570 − 117 = -687 | 2) | -451 + 978 = 527 | 3) | 221 + 480 = 701 |
| 4) | 463 − 162 = 301 | 5) | -321 − 643 = -964 | 6) | -507 + 427 = -80 |