Erafsommen tot en met 20
Erafsommen
| 1. | 16 - 8 = |
3
|
8
|
10
|
7
|
| 2. | 5 - 2 = |
6
|
9
|
1
|
3
|
| 3. | 13 - 5 = |
8
|
2
|
4
|
1
|
| 4. | 18 - 13 = |
1
|
2
|
5
|
3
|
| 5. | 17 - 6 = |
12
|
10
|
18
|
11
|
| 6. | 18 - 17 = |
5
|
9
|
1
|
7
|
| 7. | 16 - 6 = |
10
|
7
|
2
|
8
|
| 8. | 15 - 14 = |
1
|
2
|
7
|
4
|
| 9. | 20 - 4 = |
16
|
13
|
12
|
18
|
| 10. | 20 - 12 = |
8
|
9
|
3
|
2
|
| 11. | 13 - 11 = |
2
|
6
|
10
|
8
|
| 12. | 12 - 10 = |
9
|
2
|
8
|
4
|