Erbijsommen tot en met 30
Erbijsommen
| 1. | 14 + 7 = |
33
|
32
|
21
|
49
|
| 2. | 8 + 8 = |
18
|
16
|
17
|
19
|
| 3. | 12 + 11 = |
38
|
23
|
32
|
44
|
| 4. | 9 + 1 = |
1
|
4
|
5
|
10
|
| 5. | 13 + 7 = |
20
|
19
|
12
|
11
|
| 6. | 8 + 3 = |
14
|
19
|
17
|
11
|
| 7. | 14 + 7 = |
21
|
27
|
47
|
40
|
| 8. | 15 + 10 = |
50
|
45
|
25
|
29
|
| 9. | 12 + 7 = |
14
|
12
|
19
|
11
|
| 10. | 9 + 2 = |
16
|
14
|
11
|
20
|
| 11. | 3 + 3 = |
7
|
5
|
6
|
10
|
| 12. | 15 + 10 = |
25
|
23
|
38
|
29
|