| 1) | 250 − 254 = | 2) | -708 − 494 = | 3) | 611 + 177 = |
| 4) | 736 + 32 = | 5) | -915 − 784 = | 6) | 52 − 957 = |
| 1) | 250 − 254 = -4 | 2) | -708 − 494 = -1202 | 3) | 611 + 177 = 788 |
| 4) | 736 + 32 = 768 | 5) | -915 − 784 = -1699 | 6) | 52 − 957 = -905 |