Erbijsommen tot en met 40
Erbijsommen
| 1. | 12 + 3 = |
12
|
15
|
11
|
19
|
| 2. | 20 + 14 = |
34
|
23
|
33
|
37
|
| 3. | 13 + 1 = |
14
|
18
|
19
|
10
|
| 4. | 18 + 12 = |
20
|
28
|
30
|
25
|
| 5. | 20 + 10 = |
31
|
40
|
30
|
48
|
| 6. | 20 + 1 = |
43
|
40
|
21
|
23
|
| 7. | 20 + 13 = |
33
|
27
|
36
|
30
|
| 8. | 7 + 1 = |
10
|
8
|
9
|
1
|
| 9. | 16 + 3 = |
19
|
14
|
13
|
17
|
| 10. | 16 + 6 = |
25
|
40
|
22
|
36
|
| 11. | 20 + 9 = |
29
|
20
|
50
|
28
|
| 12. | 10 + 5 = |
19
|
17
|
15
|
20
|