(12.5*2.5*3.2)/(50*1.6*2.5)怎么算

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(12.5*2.5*3.2)/(50*1.6*2.5)怎么算
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(12.5*2.5*3.2)/(50*1.6*2.5)怎么算
(12.5*2.5*3.2)/(50*1.6*2.5)怎么算

(12.5*2.5*3.2)/(50*1.6*2.5)怎么算
(12.5*2.5*3.2)/(50*1.6*2.5)
={(12.5*0.8)*(2.5*4)}/{(50*0.4)*(4*2.5)}
=10*10/20*10
=1/2