Erafsommen t/m 20
Aftrekken
| 1. | 9 - 5 = |
2
|
1
|
4
|
3
|
| 2. | 16 - 7 = |
9
|
10
|
1
|
6
|
| 3. | 17 - 8 = |
9
|
5
|
4
|
7
|
| 4. | 19 - 1 = |
11
|
18
|
20
|
14
|
| 5. | 13 - 8 = |
4
|
7
|
6
|
5
|
| 6. | 6 - 4 = |
3
|
4
|
7
|
2
|
| 7. | 13 - 5 = |
8
|
1
|
9
|
6
|
| 8. | 17 - 4 = |
16
|
13
|
17
|
11
|
| 9. | 18 - 1 = |
16
|
10
|
17
|
20
|
| 10. | 8 - 4 = |
4
|
1
|
10
|
7
|
| 11. | 16 - 5 = |
20
|
15
|
17
|
11
|
| 12. | 18 - 6 = |
12
|
14
|
13
|
15
|