递等式计算,能简便的用简便方法计算4.4+5.6×2.5÷5-查字典问答网
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  递等式计算,能简便的用简便方法计算4.4+5.6×2.5÷5.6×2.5(3.8-7.7÷2.5)×2.8(7.5+7.5+7.5+7.5)×2.53.65×62+0.28×365+36.5(49.5÷7.5+49.5÷2.5)÷0.01[3.25-3.25÷(10.3+

  递等式计算,能简便的用简便方法计算

  4.4+5.6×2.5÷5.6×2.5 (3.8-7.7÷2.5)×2.8(7.5+7.5+7.5+7.5)×2.5 3.65×62+0.28×365+36.5(49.5÷7.5+49.5÷2.5)÷0.01[3.25-3.25÷(10.3+2.2)]×0.1.

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2020-04-07 12:59
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刘铁男

  (1)4.4+5.6×2.5÷5.6×2.5

  =4.4+(5.6÷5.6)×(2.5×2.5)

  =4.4+1×6.25

  =4.4+6.25

  =10.65;

  (2)(3.8-7.7÷2.5)×2.8

  =(3.8-3.08)×2.8

  =0.72×2.8

  =2.016;

  (3)(7.5+7.5+7.5+7.5)×2.5

  =(7.5×4)×2.5

  =7.5×(4×2.5)

  =7.5×10

  =75;

  (4)3.65×62+0.28×365+36.5

  =3.65×62+28×3.65+3.65×10

  =3.65×(62+28+10)

  =3.65×100

  =365;

  (5)(49.5÷7.5+49.5÷2.5)÷0.01

  =(6.6+19.8)÷0.01

  =26.4÷0.01

  =2640;

  (6)[3.25-3.25÷(10.3+2.2)]×0.1

  =[3.25-3.25÷12.5]×0.1

  =[3.25-0.26]×0.1

  =2.99×0.1

  =0.299.

2020-04-07 13:03:28

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