Question

一道数学题，简单计算，过程

41.2x8.1+11x9.25+537x0.19=
要过程和答案
不要死算
要简便

Answer 1

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）*1.1
=422+（100+5）*1.1
=422+110+5.5
=537.5

41.2x8.1+11x9.25+537x0.19
=41.2x8.1+11x9.25+53.7x1.9
=41.2x8.1+11x（8＋1.25）+（41.2＋12.5）x1.9
=41.2×8.1＋41.2×1.9＋11×8＋11×1.25＋12.5×1.9
=41.2×（8.1＋1.9）＋11×8＋11×1.25＋1.25×19
=41.2×10＋88＋（11＋19）×1.25
=412＋88＋30×1.25
=500＋37.5
=537.5

两种都行

Answer 2

41.2x8.1+11x9.25+537x0.19
=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
＝412+（53.7-41.2）*1.9+9.25+92.5
＝412+12.5*1.9+9.25+92.5
＝412+12.5*（2-0.1）+92.5+9.25
＝412+25-1.25+92.5+9.25
＝437+92.5+8
＝437+100.5
＝537.5