问一道简便计算题41.2x8.1+11x9.25+537x0.1941.2X8.1+11x9.25+537x0.19 要全过程!

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问一道简便计算题41.2x8.1+11x9.25+537x0.1941.2X8.1+11x9.25+537x0.19 要全过程!
问一道简便计算题41.2x8.1+11x9.25+537x0.19
41.2X8.1+11x9.25+537x0.19 要全过程!

问一道简便计算题41.2x8.1+11x9.25+537x0.1941.2X8.1+11x9.25+537x0.19 要全过程!
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