| 1) | 677 + 516 = | 2) | -169 − 252 = | 3) | -149 + 368 = |
| 4) | -153 + 243 = | 5) | 677 − 651 = | 6) | 290 + 61 = |
| 1) | 677 + 516 = 1193 | 2) | -169 − 252 = -421 | 3) | -149 + 368 = 219 |
| 4) | -153 + 243 = 90 | 5) | 677 − 651 = 26 | 6) | 290 + 61 = 351 |