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Introduction

Maak de sommen.


Question

1
20 - 7 =

Question

2
18 - 9 =

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3
16 - 13 =

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4
14 - 11 =

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5
18 - 14 =

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6
90 - 20 =

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7
13 - 8 =

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8
90 - 50 =

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9
15 - 14 =

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10
70 - 40 =