Erafsommen tot en met 20
Erafsommen
| 1. | 1 - 1 = |
0
|
9
|
7
|
8
|
| 2. | 15 - 12 = |
3
|
2
|
7
|
5
|
| 3. | 8 - 4 = |
5
|
6
|
4
|
2
|
| 4. | 20 - 5 = |
17
|
15
|
20
|
14
|
| 5. | 18 - 4 = |
15
|
14
|
18
|
11
|
| 6. | 15 - 8 = |
1
|
7
|
10
|
3
|
| 7. | 17 - 4 = |
12
|
15
|
11
|
13
|
| 8. | 8 - 1 = |
10
|
6
|
7
|
9
|
| 9. | 18 - 12 = |
6
|
2
|
10
|
8
|
| 10. | 12 - 3 = |
8
|
10
|
2
|
9
|
| 11. | 16 - 12 = |
9
|
2
|
4
|
3
|
| 12. | 18 - 2 = |
16
|
11
|
20
|
14
|