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