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1. \(98 + \ldots = 100\)
2. \(76 + \ldots = 80\)
3. \(44 + \ldots = 50\)
4. \(37 + \ldots = 40\)
5. \(\ldots + 7 = 100\)
6. \(\ldots + 8 = 80\)
7. \(43 + \ldots = 50\)
8. \(65 + \ldots = 70\)
9. \(99 + \ldots = 100\)
10. \(\ldots + 1 = 100\)
11. \(\ldots + 6 = 40\)
12. \(\ldots + 4 = 50\)

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Verbetersleutel

1. \(98 + 2 = 100\)
2. \(76 + 4 = 80\)
3. \(44 + 6 = 50\)
4. \(37 + 3 = 40\)
5. \(93 + 7 =100\)
6. \(72 + 8 =80\)
7. \(43 + 7 = 50\)
8. \(65 + 5 = 70\)
9. \(99 + 1 = 100\)
10. \(99 + 1 =100\)
11. \(34 + 6 =40\)
12. \(46 + 4 =50\)