Erafsommen t/m 20
Aftrekken
| 1. | 12 - 1 = |
16
|
11
|
18
|
15
|
| 2. | 14 - 8 = |
3
|
1
|
8
|
6
|
| 3. | 16 - 13 = |
5
|
3
|
9
|
10
|
| 4. | 14 - 9 = |
3
|
10
|
4
|
5
|
| 5. | 19 - 2 = |
15
|
18
|
17
|
11
|
| 6. | 19 - 4 = |
16
|
11
|
15
|
20
|
| 7. | 8 - 1 = |
1
|
5
|
7
|
3
|
| 8. | 8 - 3 = |
5
|
9
|
4
|
2
|
| 9. | 20 - 19 = |
4
|
3
|
1
|
9
|
| 10. | 12 - 3 = |
9
|
5
|
7
|
8
|
| 11. | 19 - 16 = |
6
|
4
|
10
|
3
|
| 12. | 3 - 2 = |
7
|
3
|
6
|
1
|