Erbijsommen tot en met 30
Erbijsommen
| 1. | 14 + 3 = |
14
|
11
|
17
|
20
|
| 2. | 10 + 2 = |
12
|
18
|
17
|
20
|
| 3. | 15 + 10 = |
36
|
25
|
30
|
23
|
| 4. | 2 + 1 = |
6
|
9
|
10
|
3
|
| 5. | 15 + 6 = |
27
|
21
|
46
|
31
|
| 6. | 14 + 12 = |
39
|
26
|
24
|
45
|
| 7. | 14 + 1 = |
11
|
15
|
10
|
17
|
| 8. | 8 + 7 = |
12
|
11
|
19
|
15
|
| 9. | 13 + 1 = |
14
|
10
|
12
|
20
|
| 10. | 5 + 3 = |
7
|
8
|
4
|
3
|
| 11. | 11 + 7 = |
15
|
16
|
20
|
18
|
| 12. | 15 + 9 = |
24
|
42
|
38
|
45
|