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