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