41.2×8.1+11×9.25+537×0.19=41.2*8.1+53.7*1.9+11*9.25 =41.2*（10-1.9）+53.7*1.9+11*9.25 =41.2*10-（41.2-53.7）*1.9+11*9.25 =412+12.5*1.9+11*9.25 =412+（1.1+0.8）*12.5+1.1*92.5 =412+10+（12.5+92.5）*1...