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