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Introduction

Maak de sommen.


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1
13 - 8 =

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2
90 - 20 =

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3
80 - 30 =

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4
19 - 16 =

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5
16 - 13 =

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6
17 - 6 =

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7
18 - 12 =

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8
90 - 50 =

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9
11 - 9 =

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10
19 - 12 =