Erafsommen t/m 20
Aftrekken
| 1. | 16 - 10 = |
1
|
4
|
6
|
5
|
| 2. | 14 - 3 = |
18
|
14
|
13
|
11
|
| 3. | 18 - 15 = |
10
|
6
|
3
|
4
|
| 4. | 17 - 7 = |
5
|
8
|
10
|
3
|
| 5. | 12 - 11 = |
8
|
3
|
4
|
1
|
| 6. | 17 - 13 = |
3
|
4
|
5
|
7
|
| 7. | 18 - 3 = |
18
|
16
|
13
|
15
|
| 8. | 18 - 17 = |
3
|
6
|
10
|
1
|
| 9. | 12 - 9 = |
7
|
4
|
3
|
6
|
| 10. | 14 - 7 = |
2
|
4
|
7
|
10
|
| 11. | 9 - 7 = |
1
|
2
|
3
|
5
|
| 12. | 14 - 14 = |
9
|
0
|
5
|
7
|