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