Erbijsommen t/m 40
Optellen
| 1. | 4 + 2 = |
7
|
6
|
10
|
1
|
| 2. | 11 + 2 = |
13
|
18
|
17
|
12
|
| 3. | 18 + 11 = |
25
|
29
|
47
|
21
|
| 4. | 7 + 1 = |
5
|
8
|
7
|
6
|
| 5. | 11 + 2 = |
15
|
11
|
13
|
14
|
| 6. | 6 + 5 = |
11
|
16
|
15
|
12
|
| 7. | 16 + 9 = |
30
|
47
|
25
|
31
|
| 8. | 9 + 3 = |
10
|
15
|
12
|
20
|
| 9. | 6 + 3 = |
1
|
8
|
9
|
2
|
| 10. | 16 + 14 = |
50
|
46
|
34
|
30
|
| 11. | 16 + 9 = |
28
|
25
|
49
|
48
|
| 12. | 15 + 9 = |
24
|
33
|
48
|
27
|