题目内容
lg52+
lg8+(
×
)6+(
)
-4(
)-
-
×80.25-(-2012)0.
| 2 |
| 3 |
| 3 | 2 |
| 3 |
2
|
| 4 |
| 3 |
| 16 |
| 49 |
| 1 |
| 2 |
| 4 | 2 |
分析:利用指数幂和对数的运算性质即可算出.
解答:解:原式=2lg5+
×lg23+22×33+(2
+
)
-4×[(
)-2]-
-2
×(23)
-1
=2(lg5+lg2)+108+2-4×
-2
+
-1
=2+108+2-7-2-1
=102.
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 4 |
| 4 |
| 3 |
| 7 |
| 4 |
| 1 |
| 2 |
| 1 |
| 4 |
| 1 |
| 4 |
=2(lg5+lg2)+108+2-4×
| 7 |
| 4 |
| 1 |
| 4 |
| 3 |
| 4 |
=2+108+2-7-2-1
=102.
点评:熟练掌握指数幂和对数的运算性质是解题的关键.
练习册系列答案
相关题目