Optellen van tientallen tot en met een honderdtal
Erbijsommen
| Oefening 1 | |||||
| 1. | 980 | + | 20 | = |
|
| 2. | 460 | + | 40 | = |
|
| 3. | 290 | + | 10 | = |
|
| 4. | 990 | + | 10 | = |
|
| 5. | 910 | + | 90 | = |
|
| 6. | 250 | + | 50 | = |
|
| 7. | 710 | + | 90 | = |
|
| 8. | 560 | + | 40 | = |
|
| 9. | 820 | + | 80 | = |
|
| 10. | 240 | + | 60 | = |
|
| Oefening 2 | |||||
| 1. | 980 | + | 20 | = |
|
| 2. | 860 | + | 40 | = |
|
| 3. | 530 | + | 70 | = |
|
| 4. | 770 | + | 30 | = |
|
| 5. | 910 | + | 90 | = |
|
| 6. | 880 | + | 20 | = |
|
| 7. | 310 | + | 90 | = |
|
| 8. | 580 | + | 20 | = |
|
| 9. | 440 | + | 60 | = |
|
| 10. | 850 | + | 50 | = |
|
| Oefening 3 | |||||
| 1. | 330 | + | 70 | = |
|
| 2. | 540 | + | 60 | = |
|
| 3. | 360 | + | 40 | = |
|
| 4. | 350 | + | 50 | = |
|
| 5. | 850 | + | 50 | = |
|
| 6. | 830 | + | 70 | = |
|
| 7. | 660 | + | 40 | = |
|
| 8. | 720 | + | 80 | = |
|
| 9. | 390 | + | 10 | = |
|
| 10. | 350 | + | 50 | = |
|
| Oefening 4 | |||||
| 1. | 880 | + | 20 | = |
|
| 2. | 880 | + | 20 | = |
|
| 3. | 750 | + | 50 | = |
|
| 4. | 120 | + | 80 | = |
|
| 5. | 410 | + | 90 | = |
|
| 6. | 540 | + | 60 | = |
|
| 7. | 140 | + | 60 | = |
|
| 8. | 660 | + | 40 | = |
|
| 9. | 660 | + | 40 | = |
|
| 10. | 580 | + | 20 | = |
|