题目内容
[15.5-(1
×
+1.75×
)]÷137.5%
| 3 |
| 4 |
| 5 |
| 7 |
| 2 |
| 7 |
分析:先按运算顺序计算,然后把分数和百分数化为小数,计算简便.
解答:解:[15.5-(1
×
+1.75×
)]÷137.5%,
=[15.5-(
×
+
×
)]÷137.5%,
=[15.5-(
+
)×
]÷1.375
=[15.5-
]÷1.375,
=[15.5-1.75]÷1.375,
=13.75÷1.375,
=10.
| 3 |
| 4 |
| 5 |
| 7 |
| 2 |
| 7 |
=[15.5-(
| 7 |
| 4 |
| 5 |
| 7 |
| 7 |
| 4 |
| 2 |
| 7 |
=[15.5-(
| 5 |
| 7 |
| 2 |
| 7 |
| 7 |
| 4 |
=[15.5-
| 7 |
| 4 |
=[15.5-1.75]÷1.375,
=13.75÷1.375,
=10.
点评:此题考查了学生对四则混合运算顺序的掌握,以及对数字进行灵活转化的能力.
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