1.25ⅹ6.78+25x3.47+125x0.0382
=1.25ⅹ6.78+25x3.47+1.25x3.82
=1.25ⅹ（6.78+3.82）+2.5x34.7
=1.25x10.6+2.5x34.7
=1.25×2×5.3+2.5×34.7
=2.5×（5.3+34.7）
=2.5×40
=100
原式=1.25x6.78+1.25x3.82+25x3.47
=1.25x(6.78+3.82)+1.25x6.94x10
=1.25x10.6+1.25x69.4
=1.25x(10.6+69.4)
=1.25x80
=100
1.25ⅹ6.78+25x3.47+125x0.0382=0.05*25ⅹ6.78+25*3.47+5*25*0.0382
=25*（0.339+3.47+0.191）=25*4=100
1.25*（6.78+69.4+3.82）
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