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