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