题目内容
[2
+(3
-2.75)÷1
]÷3
.
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 5 |
分析:首先把小数化为分数,再按照运算顺序计算即可.
解答:解:[2
+(3
-2.75)÷1
]÷3
=[2
+(3
-2
)÷1
]÷3
=[2
+
×
]÷3
=
×
=
.
| 4 |
| 5 |
| 2 |
| 3 |
| 5 |
| 6 |
| 1 |
| 5 |
=[2
| 4 |
| 5 |
| 2 |
| 3 |
| 3 |
| 4 |
| 5 |
| 6 |
| 1 |
| 5 |
=[2
| 4 |
| 5 |
| 11 |
| 12 |
| 6 |
| 11 |
| 1 |
| 5 |
=
| 33 |
| 10 |
| 5 |
| 16 |
=
| 33 |
| 32 |
点评:计算抓住运算顺序,注意分数、小数之间的互化.
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