题目内容
(5
+2
-2
)÷(1
+
).
| 4 |
| 5 |
| 9 |
| 10 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
分析:先通分计算两个小括号的分数加减,最后算除法.
解答:解:(5
+2
-2
)÷(1
+
),
=(5
+2
-2
)÷(1
+
),
=6
÷1
,
=
×
,
=
.
| 4 |
| 5 |
| 9 |
| 10 |
| 1 |
| 3 |
| 1 |
| 2 |
| 1 |
| 3 |
=(5
| 24 |
| 30 |
| 27 |
| 30 |
| 10 |
| 30 |
| 3 |
| 6 |
| 2 |
| 6 |
=6
| 11 |
| 30 |
| 5 |
| 6 |
=
| 191 |
| 30 |
| 6 |
| 11 |
=
| 191 |
| 55 |
点评:计算此题注意再计算除法时,要把带分数化为假分数.
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