
1个回答
展开全部
=1.25*(0.2/5.2+1.88/5.2)
=1.25*0.2/5.2+1.25*1.88/5.2
=0.25/5.2+0.25*5*1.88/5.2
=0.25*(1+9.4)/5.2
=0.25*10.4/5.2
=0.25*2
=0.5
=1.25*0.2/5.2+1.25*1.88/5.2
=0.25/5.2+0.25*5*1.88/5.2
=0.25*(1+9.4)/5.2
=0.25*10.4/5.2
=0.25*2
=0.5
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