| 1) | 619 + 22 = | 2) | 249 − 199 = | 3) | -228 − 473 = |
| 4) | 94 + 573 = | 5) | 437 + 332 = | 6) | 849 − 1 = |
| 1) | 619 + 22 = 641 | 2) | 249 − 199 = 50 | 3) | -228 − 473 = -701 |
| 4) | 94 + 573 = 667 | 5) | 437 + 332 = 769 | 6) | 849 − 1 = 848 |