问题 解答题
求下列各式的值
(1)
3-0.064

(2)-
3(x-1)3

(3)-
3-2+
3
64

(4)-
169
400
答案

(1)

3-0.064
=-0.4;

(2)-

3(x-1)3
=-(x-1)=1-x;

(3)-

3-2+
3
64
=-
3
125
64
=-
5
4

(4)-

169
400
=-
13
20

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