1.25*67.875+125*6.7875+1250*0.053375的简便算法

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1.25*67.875+125*6.7875+1250*0.053375的简便算法
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1.25*67.875+125*6.7875+1250*0.053375的简便算法
1.25*67.875+125*6.7875+1250*0.053375的简便算法

1.25*67.875+125*6.7875+1250*0.053375的简便算法
原式=1.25*67.875+1.25*678.75+1.25*53.375
=1.25*(67.875+678.75+53.375)
=1.25*(121.25+678.75)
=1.25*800
=1000

=125* (0.67875+0.53375+6.7875)

=125*8

=1000

1.25*67.875+125*6.7875+1250*0.053375
=12.5*(6.7875+67.875+5.3375)
=12.5*(12-0.2125+0.3375+67.875)
=12.5*(12.125+67.875)
=12.5*80
=1000