(0.12+0.23+0.34)*(0.23+0.34+0.45)-(0.12+0.23+0.34+0.45)*(032+034)
答案:1 悬赏:50 手机版
解决时间 2021-02-25 08:14
- 提问者网友:山高云阔
- 2021-02-24 13:46
(0.12+0.23+0.34)*(0.23+0.34+0.45)-(0.12+0.23+0.34+0.45)*(032+034)
最佳答案
- 五星知识达人网友:轻雾山林
- 2021-02-24 14:29
最后是(0.23+0.34)的话:
假设A=0.12+0.23+0.34,B=0.23+0.34
原式=A×(B+0.45)-(A+0.45)×B,
=AB+0.45A-AB-0.45B,
=0.45×(A-B);
把A=0.12+0.23+0.34,与B=0.23+0.34代入上式得:
0.45×(0.12+0.23+0.34-0.23-0.34),
=0.45×0.12,
=0.054
假设A=0.12+0.23+0.34,B=0.23+0.34
原式=A×(B+0.45)-(A+0.45)×B,
=AB+0.45A-AB-0.45B,
=0.45×(A-B);
把A=0.12+0.23+0.34,与B=0.23+0.34代入上式得:
0.45×(0.12+0.23+0.34-0.23-0.34),
=0.45×0.12,
=0.054
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