Erafsommen tot en met 20
Erafsommen
| 1. | 13 - 11 = |
2
|
8
|
1
|
7
|
| 2. | 13 - 9 = |
6
|
4
|
5
|
2
|
| 3. | 7 - 2 = |
5
|
2
|
1
|
4
|
| 4. | 12 - 3 = |
10
|
6
|
9
|
3
|
| 5. | 19 - 17 = |
2
|
7
|
3
|
9
|
| 6. | 15 - 2 = |
19
|
12
|
13
|
10
|
| 7. | 14 - 12 = |
6
|
5
|
7
|
2
|
| 8. | 12 - 10 = |
2
|
3
|
9
|
6
|
| 9. | 12 - 1 = |
16
|
11
|
18
|
15
|
| 10. | 10 - 8 = |
9
|
7
|
10
|
2
|
| 11. | 17 - 16 = |
1
|
5
|
6
|
3
|
| 12. | 9 - 3 = |
7
|
6
|
9
|
4
|