题目内容
(2012?广州模拟)1
÷(2
×
+1
).
| 11 |
| 12 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 6 |
分析:本题按照四则混合运算的顺序进行计算,先计算小括号内部的再计算小括号外面的,即可求得结果.
解答:解:1
÷(2
×
+1
),
=
÷(
×
+
),
=
÷(
+
),
=
÷(
+
),
=
÷
,
=1.
| 11 |
| 12 |
| 1 |
| 4 |
| 1 |
| 3 |
| 1 |
| 6 |
=
| 23 |
| 12 |
| 9 |
| 4 |
| 1 |
| 3 |
| 7 |
| 6 |
=
| 23 |
| 12 |
| 3 |
| 4 |
| 7 |
| 6 |
=
| 23 |
| 12 |
| 9 |
| 12 |
| 14 |
| 12 |
=
| 23 |
| 12 |
| 23 |
| 12 |
=1.
点评:本题考查了分数四则混合运算的运算顺序及基本运算技能.
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