题目内容
[-| 7 |
| 5 |
| 1 |
| 2 |
| 1 |
| (-0.75)2 |
| 1 |
| 2 |
分析:此题的运算顺序:先乘方,后乘除;先括号里的,后括号外的.
解答:解:原式=
×
×
-|2-
|
=
-
=-
.
| 5 |
| 2 |
| 1 |
| 9 |
| 9 |
| 16 |
| 25 |
| 8 |
=
| 5 |
| 32 |
| 7 |
| 8 |
| 23 |
| 32 |
点评:此题主要考查了有理数的混合运算,要特别注意运算顺序和符号问题.
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题目内容
[-| 7 |
| 5 |
| 1 |
| 2 |
| 1 |
| (-0.75)2 |
| 1 |
| 2 |
| 5 |
| 2 |
| 1 |
| 9 |
| 9 |
| 16 |
| 25 |
| 8 |
| 5 |
| 32 |
| 7 |
| 8 |
| 23 |
| 32 |