简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.

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简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.简便计算41.2*8.1+11*1.25+53.7*1.9急待解

简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.
简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.

简便计算41.2*8.1+11*1.25+53.7*1.9急待解决.
41.2*8.1+11*1.25+53.7*1.9
=41.2*8.1+11*1.25+(41.2+12.5)*1.9
=41.2*8.1+41.2*1.9+11*1.25+12.5*1.9
=41.2*(8.1+1.9)+12.5*(11+1.9)