题目内容
[
+(
-
)÷
]×
=
| 1 |
| 3 |
| 2 |
| 3 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
分析:先算小括号内的,再算中括号内的除法,然后算中括号内的加法,最后算括号外的乘法.
解答:解:[
+(
-
)÷
]×
=[
+
÷
]×
=[
+
×
]×
=[
+
]×
=
×
=
| 1 |
| 3 |
| 2 |
| 3 |
| 2 |
| 5 |
| 3 |
| 5 |
| 3 |
| 4 |
=[
| 1 |
| 3 |
| 4 |
| 15 |
| 3 |
| 5 |
| 3 |
| 4 |
=[
| 1 |
| 3 |
| 4 |
| 15 |
| 5 |
| 3 |
| 3 |
| 4 |
=[
| 1 |
| 3 |
| 4 |
| 9 |
| 3 |
| 4 |
=
| 7 |
| 9 |
| 3 |
| 4 |
=
| 7 |
| 12 |
点评:此题主要考查了分数的四则混合运算,注意运算顺序和运算法则.
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