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Introduction

Maak de sommen.


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1
19 - 12 =

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2
70 - 10 =

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3
90 - 20 =

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4
14 - 7 =

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5
15 - 14 =

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6
12 - 6 =

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7
70 - 40 =

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8
18 - 14 =

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9
13 - 8 =

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10
19 - 16 =