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Introduction

Maak de sommen.


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1
17 - 6 =

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2
50 - 10 =

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3
16 - 8 =

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4
18 - 14 =

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5
10 - 5 =

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6
19 - 12 =

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7
18 - 12 =

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8
50 - 20 =

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9
13 - 12 =

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10
60 - 50 =