Erafsommen t/m 20
Aftrekken
| 1. | 19 - 18 = |
1
|
10
|
4
|
6
|
| 2. | 8 - 4 = |
3
|
4
|
6
|
7
|
| 3. | 19 - 16 = |
8
|
3
|
4
|
10
|
| 4. | 13 - 10 = |
9
|
3
|
10
|
1
|
| 5. | 19 - 6 = |
13
|
16
|
11
|
14
|
| 6. | 10 - 3 = |
1
|
4
|
7
|
8
|
| 7. | 10 - 5 = |
7
|
1
|
5
|
8
|
| 8. | 10 - 2 = |
5
|
8
|
10
|
1
|
| 9. | 12 - 9 = |
8
|
7
|
3
|
9
|
| 10. | 18 - 12 = |
7
|
5
|
6
|
4
|
| 11. | 16 - 9 = |
7
|
6
|
8
|
1
|
| 12. | 13 - 9 = |
4
|
6
|
10
|
5
|