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2.5*(8-0.4)*12.5简算
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2.5*(8-0.4)*12.5
=2.5*12.5*(8-0.4)
=2.5*12.5*8-2.5*12.5*0.4
=2.5*(12.5*8)-(2.5*0.4)*12.5
=2.5*100-1*12.5
=250-12.5
=237.5
=2.5*12.5*(8-0.4)
=2.5*12.5*8-2.5*12.5*0.4
=2.5*(12.5*8)-(2.5*0.4)*12.5
=2.5*100-1*12.5
=250-12.5
=237.5
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