Erbijsommen tot en met 30
Erbijsommen
| 1. | 7 + 6 = |
13
|
10
|
14
|
12
|
| 2. | 15 + 12 = |
32
|
35
|
22
|
27
|
| 3. | 7 + 5 = |
12
|
11
|
20
|
14
|
| 4. | 5 + 4 = |
3
|
9
|
1
|
2
|
| 5. | 15 + 14 = |
23
|
29
|
24
|
47
|
| 6. | 4 + 3 = |
8
|
6
|
7
|
1
|
| 7. | 15 + 2 = |
17
|
13
|
15
|
10
|
| 8. | 12 + 4 = |
11
|
17
|
19
|
16
|
| 9. | 13 + 11 = |
20
|
37
|
24
|
22
|
| 10. | 12 + 7 = |
10
|
20
|
16
|
19
|
| 11. | 10 + 2 = |
12
|
15
|
11
|
17
|
| 12. | 13 + 3 = |
16
|
19
|
10
|
12
|