2x8.1+11x9.25+537x0.
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2x8.1+11x9.25+537x0.
2x8.1+11x9.25+537x0.
2x8.1+11x9.25+537x0.
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
41.2x8.1+11x9.25+537x0.19
=41.2x8.1+(41.2+12.5)x1.9+1.1x(80+12.5)
=41.2x(8.1+1.9)+12.5x(1.9+1.1)+1.1x80
=41.2x10+12.5x3+1.1x80
=412+37.5+88
=500+37.5
=537.5
41.2x8.1+11x9.25+537x0.19
=412×0.81+537x0.19+0.11x925
=412×0.81+（412+125）x0.19+0.11x925
=412×0.81+412x0.19+125x0.19+0.11x925
=412×（0.81+0.19）+125x0.19+0.11x925
=412+125×0.19+0.11x(125+800)
=412+125×（0.19+0.11）+0.11×800
=412+125×0.3+88
=500+37.5
=537.5
41.2x8.1+11x9.25+537x0.19
=41.2x8.1+11x9.25+(41.2+12.5)x1.9
=41.2x(8.1+1.9)+11x9.25+1.25x19
=412+11x9.25+1.25x(11+8)
=412+11x(9.25+1.25)+10
=412+11x(10+0.5)+10
=412+110+5.5+10
=537.5
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