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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,
题目详情
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 ,
=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 ,
▼优质解答
答案和解析
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
=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
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