| 1) | -578 + 606 = | 2) | -488 − 528 = | 3) | -17 − 903 = |
| 4) | 858 + 803 = | 5) | -637 + 881 = | 6) | 700 − 431 = |
| 1) | -578 + 606 = 28 | 2) | -488 − 528 = -1016 | 3) | -17 − 903 = -920 |
| 4) | 858 + 803 = 1661 | 5) | -637 + 881 = 244 | 6) | 700 − 431 = 269 |