| 1) | -254 − 645 = | 2) | 8 − 493 = | 3) | -998 + 65 = |
| 4) | 846 + 913 = | 5) | 141 + 994 = | 6) | -678 − 457 = |
| 1) | -254 − 645 = -899 | 2) | 8 − 493 = -485 | 3) | -998 + 65 = -933 |
| 4) | 846 + 913 = 1759 | 5) | 141 + 994 = 1135 | 6) | -678 − 457 = -1135 |