Erbijsommen tot 40 [1]
Optellen
| Oefening 1 | |||||
| 1. | 17 | + | 16 | = |
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| 2. | 7 | + | 4 | = |
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| 3. | 20 | + | 17 | = |
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| 4. | 16 | + | 9 | = |
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| 5. | 6 | + | 5 | = |
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| 6. | 9 | + | 2 | = |
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| 7. | 2 | + | 1 | = |
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| 8. | 5 | + | 2 | = |
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| 9. | 15 | + | 6 | = |
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| 10. | 13 | + | 3 | = |
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| Oefening 2 | |||||
| 1. | 18 | + | 9 | = |
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| 2. | 20 | + | 15 | = |
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| 3. | 6 | + | 1 | = |
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| 4. | 20 | + | 5 | = |
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| 5. | 6 | + | 3 | = |
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| 6. | 15 | + | 12 | = |
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| 7. | 18 | + | 8 | = |
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| 8. | 19 | + | 7 | = |
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| 9. | 20 | + | 7 | = |
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| 10. | 8 | + | 1 | = |
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| Oefening 3 | |||||
| 1. | 15 | + | 10 | = |
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| 2. | 2 | + | 2 | = |
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| 3. | 15 | + | 2 | = |
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| 4. | 13 | + | 1 | = |
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| 5. | 12 | + | 10 | = |
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| 6. | 10 | + | 6 | = |
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| 7. | 19 | + | 18 | = |
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| 8. | 7 | + | 3 | = |
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| 9. | 17 | + | 6 | = |
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| 10. | 15 | + | 10 | = |
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| Oefening 4 | |||||
| 1. | 19 | + | 5 | = |
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| 2. | 9 | + | 8 | = |
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| 3. | 9 | + | 5 | = |
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| 4. | 12 | + | 9 | = |
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| 5. | 3 | + | 3 | = |
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| 6. | 20 | + | 9 | = |
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| 7. | 18 | + | 10 | = |
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| 8. | 16 | + | 11 | = |
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| 9. | 12 | + | 1 | = |
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| 10. | 11 | + | 3 | = |
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