643*0.83+357*0.83 2.5*32*0.125简便计算

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643*0.83+357*0.832.5*32*0.125简便计算643*0.83+357*0.832.5*32*0.125简便计算643*0.83+357*0.832.5*32*0.125简便计算6

643*0.83+357*0.83 2.5*32*0.125简便计算
643*0.83+357*0.83 2.5*32*0.125
简便计算

643*0.83+357*0.83 2.5*32*0.125简便计算
643*0.83+357*0.83
=(643+357)*0.83
=1000*0.83
=830
2.5*32*0.125
=2.5*4*8*0.125
=10*1
=10