| 1) | 193 − 651 = | 2) | 797 + 757 = | 3) | -739 + 274 = |
| 4) | -549 − 103 = | 5) | -304 + 935 = | 6) | 73 − 795 = |
| 1) | 193 − 651 = -458 | 2) | 797 + 757 = 1554 | 3) | -739 + 274 = -465 |
| 4) | -549 − 103 = -652 | 5) | -304 + 935 = 631 | 6) | 73 − 795 = -722 |