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