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Combined operation

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    It's about the combined operation.
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  • What is the answer of this number?
    It is 80.
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  • What is the answer of this number?
    It is 120.
  •  15
  • What is the answer of this number?
    It is 55.
  •  15
  • What is the answer of this number?
    It is 12.
  •  15
  • What is the answer of this number?
    It is 24.
  •  15
  • What is the answer of this number?
    It is 314.
  •  15
  • What is the answer of this number?
    It is 173.
  •  15
  • What is the answer of this number?
    It is 656.
  •  15
  • What is the answer of this number?
    It is 50.
  •  15
  • What is the answer of this number?
    It is 54.
  •  15