问题 解答题
计算下列各式的值
(1)(2
1
4
 
1
2
-(-9.6)0-(3
3
8
 -
2
3
+(1.5)-2
(2)3 2+log32+lg52+
2
3
lg8+lg5•lg20+lg22.
答案

(1)(2

1
4
 
1
2
-(-9.6)0-(3
3
8
 -
2
3
+(1.5)-2=(
9
4
)
1
2
-1-(
27
8
)
-
2
3
+(
3
2
)
-2
=
3
2
-1-(
3
2
)
3×(-
2
3
)
+
4
9
=
3
2
-1-
4
9
+
4
9
=
1
2

(2))3 2+log32+lg52+

2
3
lg8+lg5•lg20+lg22=323log⁡32+2lg⁡5+2lg⁡2+lg⁡5(lg⁡5+lg⁡4)+lg⁡22

=18+2+lg25+2lg2lg5+lg22=20+(lg2+lg5)2=20+1=21.

单项选择题
单项选择题