41.2*8.1+21*9.25+537*0.19
问题描述：
41.2*8.1+21*9.25+537*0.19
要求简化计算
答
41.2*8.1+21*9.25+537*0.19 =41.2*8.1+21*9.25+（41.2+12.5）*1.9 =41.2*（8.1+1.9）+10.5*19.5+12.5*1.9 =412+10.5*（20-0.5）+12.5*（2-0.1） =412+210-15.75+25-1.25 =647-17=630