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Introduction

Maak de sommen.


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1
60 - 30 =

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2
11 - 9 =

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3
16 - 8 =

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4
16 - 13 =

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5
70 - 40 =

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17 - 6 =

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7
19 - 16 =

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8
14 - 11 =

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9
70 - 10 =

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10
18 - 12 =