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