【简便方法计算题:(2.17+5.49+3.81)*(5.4-查字典问答网
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  【简便方法计算题:(2.17+5.49+3.81)*(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)*((2.17+5.49+3.81)*(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)*(2.17+5.49)】

  简便方法计算题:(2.17+5.49+3.81)*(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)*(

  (2.17+5.49+3.81)*(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)*(2.17+5.49)

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2020-03-17 13:47
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童恩健

  (2.17+5.49+3.81)*(5.49+2.17+9.2)-(3.81+2.17+5.49+9.2)*(2.17+5.49)

  =(2.17+5.49+3.81)*(5.49+2.17)+(2.17+5.49+3.81)*9.2-(3.81+2.17+5.49)*(2.17+5.49)-9.2*(2.17+5.49)

  =(2.17+5.49+3.81)*9.2-9.2*(2.17+5.49)

  =(2.17+5.49)*9.2+3.81*9.2-9.2*(2.17+5.49)

  =3.81*9.2

  =35.052

2020-03-17 13:50:00

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