题目内容
计算：
÷[(
+
)×
]．
| 5 |
| 8 |
| 3 |
| 5 |
| 3 |
| 4 |
| 5 |
| 9 |
分析：根据分数四则混合运算的运算顺序，本题可先运用分配律计算中括号里面的，再算括号外的除法．
解答：解：
÷[（
+
）×
]，
=
÷[
×
+
×
]，
=
÷[
+
]，
=
÷
，
=
×
，
=
．
| 5 |
| 8 |
| 3 |
| 5 |
| 3 |
| 4 |
| 5 |
| 9 |
=
| 5 |
| 8 |
| 3 |
| 5 |
| 5 |
| 9 |
| 3 |
| 4 |
| 5 |
| 9 |
=
| 5 |
| 8 |
| 1 |
| 3 |
| 5 |
| 12 |
=
| 5 |
| 8 |
| 9 |
| 12 |
=
| 5 |
| 8 |
| 12 |
| 9 |
=
| 5 |
| 6 |
点评：本题考查了分数的四则混合运算，要依据运算顺序进行，能运用运算律简算的要简算．
练习册系列答案
相关题目