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51.2X8.1+11X9.25+537X0.
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51.2X8.1+11X9.25+537X0.19怎么做
51.2X8.1+11X9.25+537X0.19
=512*0.81+（512+25）*0.19+11*9.25
=512+0.81+512*0.19+25*0.19+11*9+11*0.25
=512*(0.81+0.19)+25*0.19+25*0.11+99
=512+25*(0.19+0.11)+99
=512+7.5+99
=618.5
51.2X8.1+11X9.25+537X0.19
=512*0.81+（512+25）*0.19+11*9.25
=512+0.81+512*0.19+25*0.19+11*9+11*0.25
=512*(0.81+0.19)+25*0.19+25*0.11+99
=512+25*(0.19+0.11)+99
=512+7.5+99
=618.5
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