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