| 1) | -580 − 131 = | 2) | -370 + 785 = | 3) | -737 − 237 = |
| 4) | 516 + 515 = | 5) | 7 + 658 = | 6) | 89 + 168 = |
| 1) | -580 − 131 = -711 | 2) | -370 + 785 = 415 | 3) | -737 − 237 = -974 |
| 4) | 516 + 515 = 1031 | 5) | 7 + 658 = 665 | 6) | 89 + 168 = 257 |