Complète les soustractions suivantes par le bon nombre.
| 3 | 1 | 2 | 3 | 2 | 1 | 4 | |
| - | 1 | 2 | 5 | 2 | 3 | ? | 4 |
__________________________
| = | 1 | 8 | 7 | 0 | 8 | 3 | 0 |
| 7 | ? | 8 | 5 | 6 | 9 | 8 | 5 | |
| - | 3 | 6 | 9 | 5 | 2 | 6 | 5 | 3 |
__________________________
| = | 3 | 7 | 9 | 0 | 4 | 3 | 3 | 2 |
| 5 | 1 | 2 | 4 | 4 | 4 | 6 | 6 | 6 | |
| - | 2 | 5 | 2 | 2 | 1 | 2 | 3 | 6 | 2 |
__________________________
| = | 2 | 6 | 0 | 2 | 3 | ? | 3 | 0 | 4 |
| 4 | ? | 4 | 6 | 2 | 8 | 9 | |
| - | 2 | 8 | 3 | 2 | 6 | 5 | 3 |
__________________________
| = | 1 | 5 | 1 | 3 | 6 | 3 | 6 |
| 6 | ? | 2 | 5 | 2 | 1 | 0 | |
| - | 2 | 1 | 0 | 4 | 5 | 2 | 3 |
__________________________
| = | 4 | 2 | 2 | 0 | 6 | 8 | 7 |