Erbijsommen t/m 40
Optellen
| 1. | 17 + 3 = |
10
|
13
|
15
|
20
|
| 2. | 15 + 10 = |
32
|
35
|
25
|
34
|
| 3. | 17 + 8 = |
47
|
32
|
41
|
25
|
| 4. | 8 + 1 = |
3
|
1
|
9
|
7
|
| 5. | 9 + 1 = |
9
|
1
|
2
|
10
|
| 6. | 14 + 1 = |
14
|
18
|
15
|
17
|
| 7. | 14 + 1 = |
10
|
14
|
20
|
15
|
| 8. | 18 + 4 = |
26
|
31
|
46
|
22
|
| 9. | 16 + 10 = |
36
|
22
|
20
|
26
|
| 10. | 18 + 8 = |
50
|
43
|
41
|
26
|
| 11. | 8 + 7 = |
15
|
11
|
16
|
20
|
| 12. | 8 + 5 = |
12
|
15
|
14
|
13
|