Erbijsommen tot en met 30
Erbijsommen
| 1. | 8 + 3 = |
15
|
13
|
11
|
10
|
| 2. | 15 + 5 = |
13
|
17
|
20
|
15
|
| 3. | 7 + 1 = |
10
|
8
|
6
|
9
|
| 4. | 11 + 8 = |
17
|
19
|
18
|
15
|
| 5. | 9 + 2 = |
14
|
18
|
11
|
10
|
| 6. | 9 + 8 = |
20
|
17
|
16
|
11
|
| 7. | 15 + 11 = |
26
|
47
|
41
|
29
|
| 8. | 14 + 3 = |
19
|
16
|
15
|
17
|
| 9. | 9 + 4 = |
13
|
20
|
19
|
11
|
| 10. | 14 + 6 = |
17
|
14
|
20
|
18
|
| 11. | 10 + 2 = |
14
|
12
|
19
|
18
|
| 12. | 10 + 1 = |
11
|
20
|
18
|
19
|