简便计算 41.2*8.1+11*9.25+53.7*1.9
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41.2*8.1+11*9.25+53.7*1.9
=41.2*(10-1.9)+(10+1)*9.25+53.7*1.9
=412-41.2*1.9+92.5+9.25+53.7*1.9
=(53.7-41.2)*1.9+412+92.5+9.25
=12.5*(2-0.1)+412+92.5+9.25
=25-1.25+412+92.5+9.25
=25+412+92.5+(9.25-1.25)
=437+92.5+8
=437+100.5
=537.5
=41.2*(10-1.9)+(10+1)*9.25+53.7*1.9
=412-41.2*1.9+92.5+9.25+53.7*1.9
=(53.7-41.2)*1.9+412+92.5+9.25
=12.5*(2-0.1)+412+92.5+9.25
=25-1.25+412+92.5+9.25
=25+412+92.5+(9.25-1.25)
=437+92.5+8
=437+100.5
=537.5
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