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뺄셈: 2 - 1

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  78
2
  52
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  48
3
  35
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  29
4
  55
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  52
5
  31
    6
  25
6
  30
    3
  27
7
  32
    3
  29
8
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9
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    5
  14
10
  75
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11
  83
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  81
12
  14
    5
   9
13
  39
    4
  35
14
  14
    7
   7
15
  43
    5
  38
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