题目内容
| 5 |
| 18 |
| 5 |
| 7 |
| 1 |
| 3 |
| 7 |
| 16 |
分析:此题应按运算顺序计算,先算小括号内的,再算中括号内的,最后算括号外的.
解答:解:
÷[(
-
)×
],
=
÷[
×
],
=
÷
,
=
×6,
=
.
| 5 |
| 18 |
| 5 |
| 7 |
| 1 |
| 3 |
| 7 |
| 16 |
=
| 5 |
| 18 |
| 8 |
| 21 |
| 7 |
| 16 |
=
| 5 |
| 18 |
| 1 |
| 6 |
=
| 5 |
| 18 |
=
| 5 |
| 3 |
点评:此题重点考查四则混合运算的顺序,同时考查了学生对分数四则混合运算的计算能力.
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