Erafsommen t/m 20
Aftrekken
| 1. | 9 - 2 = |
9
|
7
|
6
|
4
|
| 2. | 3 - 2 = |
7
|
5
|
1
|
4
|
| 3. | 19 - 13 = |
6
|
3
|
8
|
2
|
| 4. | 12 - 8 = |
4
|
5
|
7
|
9
|
| 5. | 6 - 3 = |
9
|
10
|
7
|
3
|
| 6. | 15 - 3 = |
17
|
18
|
16
|
12
|
| 7. | 12 - 10 = |
9
|
2
|
4
|
8
|
| 8. | 18 - 16 = |
2
|
9
|
4
|
7
|
| 9. | 12 - 5 = |
6
|
7
|
9
|
3
|
| 10. | 11 - 3 = |
10
|
8
|
5
|
7
|
| 11. | 15 - 10 = |
5
|
9
|
10
|
2
|
| 12. | 4 - 2 = |
3
|
2
|
10
|
6
|