Erafsommen t/m 20
Aftrekken
| 1. | 12 - 4 = |
4
|
3
|
8
|
10
|
| 2. | 17 - 15 = |
2
|
10
|
9
|
5
|
| 3. | 13 - 2 = |
11
|
16
|
20
|
15
|
| 4. | 11 - 10 = |
9
|
3
|
7
|
1
|
| 5. | 11 - 10 = |
1
|
7
|
4
|
8
|
| 6. | 16 - 14 = |
1
|
2
|
10
|
6
|
| 7. | 19 - 19 = |
0
|
2
|
8
|
5
|
| 8. | 19 - 16 = |
3
|
5
|
10
|
1
|
| 9. | 16 - 3 = |
11
|
13
|
19
|
12
|
| 10. | 17 - 15 = |
7
|
6
|
2
|
1
|
| 11. | 18 - 16 = |
2
|
10
|
1
|
4
|
| 12. | 17 - 14 = |
7
|
3
|
6
|
5
|