Erafsommen tot 20
Aftrekken
| Oefening 1 | |||||
| 1. | 18 | - | 1 | = |
|
| 2. | 12 | - | 11 | = |
|
| 3. | 13 | - | 3 | = |
|
| 4. | 7 | - | 1 | = |
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| 5. | 15 | - | 3 | = |
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| 6. | 14 | - | 9 | = |
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| 7. | 20 | - | 9 | = |
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| 8. | 14 | - | 11 | = |
|
| 9. | 18 | - | 2 | = |
|
| 10. | 20 | - | 15 | = |
|
| Oefening 2 | |||||
| 1. | 16 | - | 11 | = |
|
| 2. | 19 | - | 16 | = |
|
| 3. | 8 | - | 2 | = |
|
| 4. | 13 | - | 5 | = |
|
| 5. | 18 | - | 6 | = |
|
| 6. | 18 | - | 14 | = |
|
| 7. | 19 | - | 3 | = |
|
| 8. | 9 | - | 1 | = |
|
| 9. | 14 | - | 6 | = |
|
| 10. | 20 | - | 12 | = |
|
| Oefening 3 | |||||
| 1. | 20 | - | 14 | = |
|
| 2. | 19 | - | 13 | = |
|
| 3. | 17 | - | 15 | = |
|
| 4. | 13 | - | 9 | = |
|
| 5. | 19 | - | 6 | = |
|
| 6. | 16 | - | 5 | = |
|
| 7. | 17 | - | 11 | = |
|
| 8. | 16 | - | 9 | = |
|
| 9. | 16 | - | 4 | = |
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| 10. | 19 | - | 4 | = |
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| Oefening 4 | |||||
| 1. | 14 | - | 3 | = |
|
| 2. | 15 | - | 1 | = |
|
| 3. | 12 | - | 4 | = |
|
| 4. | 8 | - | 5 | = |
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| 5. | 16 | - | 11 | = |
|
| 6. | 15 | - | 8 | = |
|
| 7. | 2 | - | 1 | = |
|
| 8. | 20 | - | 3 | = |
|
| 9. | 11 | - | 5 | = |
|
| 10. | 12 | - | 10 | = |
|