2.25x37.9+12.5x2.15+125x0.206简算
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2.25x37.9+12.5x2.15+125x0.206
=2.25x37.9+12.5x(2.15+2.06)
=10x37.9+1.25x37.9+12.5x4.21
=379+1.25x(37.9+42.1)
=379+1.25x80
=379+100
=479
=2.25x37.9+12.5x(2.15+2.06)
=10x37.9+1.25x37.9+12.5x4.21
=379+1.25x(37.9+42.1)
=379+1.25x80
=379+100
=479
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2.25x37.9+12.5x2.15+125x0.206
=(1+1.25)*37.9+1.25*21.5+1.25*20.6
=37.9+1.25*37.9+1.25*21.5+1.25*20.6
=37.9+1.25*(37.9+21.5+20.6)
=37.9+1.25*80
=37.9+100=137.9
=(1+1.25)*37.9+1.25*21.5+1.25*20.6
=37.9+1.25*37.9+1.25*21.5+1.25*20.6
=37.9+1.25*(37.9+21.5+20.6)
=37.9+1.25*80
=37.9+100=137.9
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2.25x37.9+12.5x2.15+125x0.206
=37.9+1.25x37.9+1.25x21.5+1.25x20.6
=37.9+1.25x（37.9+21.5+20.6）
=37.9+1.25x80
=37.9+100
=137.9
=37.9+1.25x37.9+1.25x21.5+1.25x20.6
=37.9+1.25x（37.9+21.5+20.6）
=37.9+1.25x80
=37.9+100
=137.9
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