Erafsommen t/m 30
Aftrekken
| 1. | 28 - 17 = |
16
|
10
|
15
|
11
|
| 2. | 17 - 6 = |
11
|
16
|
17
|
10
|
| 3. | 29 - 9 = |
20
|
11
|
17
|
14
|
| 4. | 28 - 14 = |
11
|
10
|
12
|
14
|
| 5. | 11 - 4 = |
4
|
8
|
1
|
7
|
| 6. | 28 - 4 = |
42
|
30
|
24
|
39
|
| 7. | 29 - 7 = |
49
|
28
|
22
|
21
|
| 8. | 21 - 1 = |
12
|
16
|
20
|
10
|
| 9. | 15 - 11 = |
2
|
9
|
4
|
7
|
| 10. | 21 - 4 = |
16
|
17
|
20
|
13
|
| 11. | 6 - 3 = |
10
|
3
|
2
|
4
|
| 12. | 19 - 3 = |
15
|
16
|
20
|
17
|