问题 解答题
化简或求值:
(1)(
27
8
)
-
2
3
-(
49
9
)
0.5
+(0.008)-
2
3
×
2
25

(2)计算.
lg5•lg8000+(lg2
3
)
2
lg600-
1
2
lg0.036-
1
2
lg0.1
答案

(1)(

27
8
)-
2
3
-(
49
9
)
0.5
+(0.008)-
2
3
×
2
25

=(

8
27
)
2
3
 -(
49
9
)
1
2
+(
1000
8
)
2
3
×
2
25

=

4
9
-
7
3
+25×
2
25
=-
17
9
+2=
1
9
  

(2)

lg5•lg8000+(lg2
3
)
2
lg600-
1
2
lg0.036-
1
2
lg0.1

=

lg5(3+3lg2)+3(lg2)2
(lg6+2)-lg
36
1000
×
1
10

=

3lg5+3lg2(lg5+lg2)
lg6+2-lg
6
100

=

3
4

故答案为:(1)

1
9
(2)
3
4

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