9/10*34.6+111*1.8+54.3/(除以)10/9 简便计算

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9/10*34.6+111*1.8+54.3/(除以)10/9简便计算9/10*34.6+111*1.8+54.3/(除以)10/9简便计算9/10*34.6+111*1.8+54.3/(除以)10/

9/10*34.6+111*1.8+54.3/(除以)10/9 简便计算
9/10*34.6+111*1.8+54.3/(除以)10/9 简便计算

9/10*34.6+111*1.8+54.3/(除以)10/9 简便计算
9/10×34.6+111×1.8+54.3÷10/9
  =0.9×34.6+111×2×0.9+54.3×0.9
  =0.9×(34.6+222+54.3)
  =(1-0.1)×310.9
  =1×310.9-0.1×310.9
  =310.9-31.09
  =279.81

9/10*34.6+111*18/10+54.3*9/10=9/10*34.6+111*2*9/10+54.3*9/10=9/10*(34.6+111*2+54.3)=(9/10)*311=279.9