题目内容
27
+16
-(
)-2-(
)
=
.
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 8 |
| 27 |
| 2 |
| 3 |
| 77 |
| 9 |
| 77 |
| 9 |
分析:把27化为33,16化为42,
化为2-1,
化为(
)3,然后进行有理指数幂的化简求值.
| 1 |
| 2 |
| 8 |
| 27 |
| 2 |
| 3 |
解答:解:27
+16
-(
)-2-(
)
=(33)
+(42)
-(2-1)-2-((
)3)
=32+4-4-(
)2
=
.
故答案为
.
| 2 |
| 3 |
| 1 |
| 2 |
| 1 |
| 2 |
| 8 |
| 27 |
| 2 |
| 3 |
=(33)
| 2 |
| 3 |
| 1 |
| 2 |
| 2 |
| 3 |
| 2 |
| 3 |
=32+4-4-(
| 2 |
| 3 |
=
| 77 |
| 9 |
故答案为
| 77 |
| 9 |
点评:本题考查了有理指数幂的化简求值,解答的关键是熟记有关公式,此题是基础题.
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