1.(本小题满分 12 分)
2 27 2
( )- 2 + (1- 2)0 - ( )3 ;(2) 2 log 2 log 32 log 8 5
3 3 3
3 8
log 3
5
【答案】(1)1;(2)-3
2.(满分 12 分)不用计算器计算:(注:只要有正确的转换,都要给步骤分,不能只看结果)
(1)
27 lg 25 lg 4 7log7 2 (9.8)0
2
2
log3
3 27 3 49 )0.5 (0.008) 2 ) ( ( (2)
8 9 25
【答案】(1) ;(2)
13 2
1 9
3.(12 分) 化简或求值:
4 1 1 8 1
(1) (2 )0 22 (2 ) 2 ( )3 ;
5 4 27
(2) 2(lg 2)2 lg 2 lg 5 【答案】(1) ;(2)1
(lg 2)2 lg 2 1 1
2
4.计算
27 lg 25 lg 4 7log7 (9.8)0 (1) log 3 3 1 2 1 0 1 3 (2) 6 ( 1)(3 ) ( 3
)
4 64 8
【答案】(1)
2
13 2
(2) 16
5.(本小题满分 10 分) 计算下列各式的值:
2 27 2
(1) ( )- 2 + (1- 2)0 - ( )3 ;
3 8
log5
(2) 2 log 2 log 8 3 log 32 3 3 5
3【答案】(1)1;(2)-3.
6.求值:1) lg 5(lg 8 lg1000) (lg 2 3 )2 lg lg 0.06 ;
1
6
(a b) 2 a2 b3 2) 6 a • b5 2 1 1 1 3 1
试卷第 1 页,总 3 页
【答案】1)1;2)1 。
1 2
7.(12 分)(1)计算log 2 25• log3 4 •log5 9
lg 0.001 ( )3
(2)
3 a5
3 a 7 a 6
1
【答案】(1)-4;(2) a 2
。
8.(本小题满分 12 分)
计算 2 log 2 log
32 log 8 5log5 3
的值。
3 3 9 3
【答案】-1
9.(本小题满分 13 分) 计算下列各式的值:
(1) 3 (4)3 (
1 )01
2 0.25
2
( 2)4
;
lg 5 lg 2 ( 1
)2 ( 3 2 1 1)0 log2
8 .
4
【答案】(1)原式= 4 1 2
2
3 ;(2)原式=-4
10.(本小题满分 12 分)计算:
4
(1)0.25×
1
-4÷ 5 10
1
2 1 ; 2
16
(2) lg 25 lg 2 • lg 50 lg 22
. 【答案】 (1)原式=-45 ;(2) 1
原式=2
11. 求lg12.5 lg8 lg 的值.
【答案】 lg12.5 lg 5 2 lg 1 1 8 2
12. 计算下列各式的值:
1
7 0 1 0.25 3 1 1 (1) (0.0081) 4 [3 ( ) ] (3 ) 1
3 8
[81 8 ] 2 10 0.0273 ; (2) 2(lg 2)2 lg 2 • lg 5 (lg 2)2 lg 2 1 ;
(0.0081) 1
[3( 7)0 ]1 [810.25
3 1 2 1 【答案】(1)原式=
4 (3 ) 3 ] 10 0.0271
3
8 8
= 11 1
(0.3)
4
14 3 1 [3
40.25
( ) 3 3
2
3 3 ] 2 10 0.3 3
=0
试卷第 2 页,总 3 页
2)
(
(2)原式= 2(lg 2)2 lg
2 • lg 5 (lg 2)2 lg 2 1 = 1 ( lg 2)2 lg 2 1 2 log7 2 1 1
2 2( lg 2) lg 2 •(1- lg 2)2 2
=1
13. 求log3
4 27 lg 25 lg 4 7的值
3
3
3
log3 lg(25 4) 2 【答案】解:原式=
3
1 15 2 2 2 lg10 2 = log3 3 = 1 4 4
4
4
14. 计算下列各式
(Ⅰ) (1) lg2 2 lg 5 lg 20 1
(Ⅱ) (3 2
【答案】
16 1 33 )6 ( 2 2 ) 4 ( ) 2
49
4
4 2 80.25 (2011)0
解:(1)原式 lg 2 2 (1 lg 2)(1 lg 2) 1 0. 4 24 1 7 2(2)原式 22 33 (2 ) 4 4
4 27 2 7 2 1 100.
433 4 1 3
15.(本小题满分 8 分)
log0不用计算器计算: log3 27 lg 25 lg 4 77 (9.8) 。
2
【答案】原式
3 2 3 13 2 2
试卷第 3 页,总 3 页
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At the end, Xiao Bian gives you a passage. Minand once said, \"people who learn to learn are very happy people.\". In every wonderful life, learning is an eternal theme. As a professional clerical and teaching position, I understand the importance of
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