问题 解答题
计算下列各题
(1)52log53+log432-log3(log28)
(2)(0.027)-
1
3
-(
1
7
)-2+(2
7
9
)
1
2
-(
2
-1)0
答案

(1)52log53+log432-log3(log28)

=5log532+log2225-log3(log223)

=9+

5
2
-1=
21
2

(2)(0.027)-

1
3
-(
1
7
)
-2
+(2
7
9
)
1
2
-(
2
-1)
0

=[(0.3) 3]-

1
3
-(7)2+(
25
9
)
1
2
-1

=

10
3
-49+
5
3
-1

=-45.

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