Erbijsommen tot 20
Optellen
| Oefening 1 | |||||
| 1. | 4 | + | 2 | = |
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| 2. | 8 | + | 8 | = |
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| 3. | 9 | + | 4 | = |
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| 4. | 10 | + | 10 | = |
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| 5. | 10 | + | 10 | = |
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| 6. | 7 | + | 2 | = |
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| 7. | 10 | + | 9 | = |
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| 8. | 6 | + | 4 | = |
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| 9. | 10 | + | 2 | = |
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| 10. | 10 | + | 4 | = |
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| Oefening 2 | |||||
| 1. | 10 | + | 4 | = |
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| 2. | 10 | + | 6 | = |
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| 3. | 7 | + | 3 | = |
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| 4. | 7 | + | 5 | = |
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| 5. | 10 | + | 8 | = |
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| 6. | 7 | + | 7 | = |
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| 7. | 7 | + | 4 | = |
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| 8. | 5 | + | 4 | = |
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| 9. | 10 | + | 1 | = |
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| 10. | 4 | + | 1 | = |
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| Oefening 3 | |||||
| 1. | 8 | + | 8 | = |
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| 2. | 8 | + | 7 | = |
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| 3. | 8 | + | 5 | = |
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| 4. | 10 | + | 4 | = |
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| 5. | 4 | + | 2 | = |
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| 6. | 5 | + | 2 | = |
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| 7. | 7 | + | 3 | = |
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| 8. | 8 | + | 3 | = |
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| 9. | 9 | + | 4 | = |
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| 10. | 2 | + | 1 | = |
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| Oefening 4 | |||||
| 1. | 9 | + | 7 | = |
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| 2. | 10 | + | 8 | = |
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| 3. | 10 | + | 5 | = |
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| 4. | 9 | + | 8 | = |
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| 5. | 7 | + | 5 | = |
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| 6. | 1 | + | 1 | = |
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| 7. | 9 | + | 3 | = |
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| 8. | 8 | + | 7 | = |
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| 9. | 9 | + | 3 | = |
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| 10. | 10 | + | 1 | = |
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