题目内容
(2012?广州模拟)(4
-3
)÷(
+
).
| 1 |
| 6 |
| 3 |
| 4 |
| 3 |
| 14 |
| 1 |
| 7 |
分析:按运算顺序计算,两个括号同时进行,注意通分,在最后注意约分.
解答:解:(4
-3
)÷(
+
),
=(4
-3
)÷(
+
),
=
÷
,
=
×
,
=
.
| 1 |
| 6 |
| 3 |
| 4 |
| 3 |
| 14 |
| 1 |
| 7 |
=(4
| 2 |
| 12 |
| 9 |
| 12 |
| 3 |
| 14 |
| 2 |
| 14 |
=
| 5 |
| 12 |
| 5 |
| 14 |
=
| 5 |
| 12 |
| 14 |
| 5 |
=
| 7 |
| 6 |
点评:此题考查了四则混合运算的顺序,以及通过通分和约分进行简算.
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