0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7/0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2=0.1*0.3*0.9*(1+8+27)/0.1*0.2*0.4*(1+8+27)=0.1*0.3*0.9/0.1*0.2*0.4=27/8我想知道0.1*0.3*0.9*(1+8+27)/0.1*0.2*0.4*(1+8+27)这一步是怎么转换过来的,

Question

0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7/0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2
=0.1*0.3*0.9*(1+8+27)/0.1*0.2*0.4*(1+8+27)
=0.1*0.3*0.9/0.1*0.2*0.4
=27/8
我想知道 0.1*0.3*0.9*(1+8+27)/0.1*0.2*0.4*(1+8+27)
这一步是怎么转换过来的 ,

Answer 1

0.1*0.3*0.9+0.2*0.6*1.8+0.3*0.9*2.7/0.1*0.2*0.4+0.2*0.4*0.8+0.3*0.6*1.2
=0.1*0.3*0.9+0.1*2*0.3*2*0.9*2+0.1*3*0.3*3*0.9*3/0.1*0.2*0.4+0.1*2*0.2*2*0.4*2+0.1*3*0.2*3*0.4*3
=0.1*0.3*0.9（1+2*2*2+3*3*3）/0.1*0.2*0.4（1+2*2*2+3*3*3）
=0.1*0.3*0.9/0.1*0.2*0.4 约去（1+2*2*2+3*3*3）
=27/8