Optellen van tientallen tot en met een honderdtal
Erbijsommen
| Oefening 1 | |||||
| 1. | 420 | + | 80 | = |
|
| 2. | 570 | + | 30 | = |
|
| 3. | 990 | + | 10 | = |
|
| 4. | 250 | + | 50 | = |
|
| 5. | 420 | + | 80 | = |
|
| 6. | 850 | + | 50 | = |
|
| 7. | 510 | + | 90 | = |
|
| 8. | 820 | + | 80 | = |
|
| 9. | 350 | + | 50 | = |
|
| 10. | 960 | + | 40 | = |
|
| Oefening 2 | |||||
| 1. | 910 | + | 90 | = |
|
| 2. | 140 | + | 60 | = |
|
| 3. | 920 | + | 80 | = |
|
| 4. | 720 | + | 80 | = |
|
| 5. | 540 | + | 60 | = |
|
| 6. | 230 | + | 70 | = |
|
| 7. | 370 | + | 30 | = |
|
| 8. | 870 | + | 30 | = |
|
| 9. | 440 | + | 60 | = |
|
| 10. | 820 | + | 80 | = |
|
| Oefening 3 | |||||
| 1. | 850 | + | 50 | = |
|
| 2. | 930 | + | 70 | = |
|
| 3. | 850 | + | 50 | = |
|
| 4. | 990 | + | 10 | = |
|
| 5. | 510 | + | 90 | = |
|
| 6. | 620 | + | 80 | = |
|
| 7. | 770 | + | 30 | = |
|
| 8. | 420 | + | 80 | = |
|
| 9. | 250 | + | 50 | = |
|
| 10. | 370 | + | 30 | = |
|
| Oefening 4 | |||||
| 1. | 460 | + | 40 | = |
|
| 2. | 350 | + | 50 | = |
|
| 3. | 280 | + | 20 | = |
|
| 4. | 520 | + | 80 | = |
|
| 5. | 690 | + | 10 | = |
|
| 6. | 790 | + | 10 | = |
|
| 7. | 510 | + | 90 | = |
|
| 8. | 760 | + | 40 | = |
|
| 9. | 410 | + | 90 | = |
|
| 10. | 720 | + | 80 | = |
|