题目内容
计算:[(6.875-2
)×25%+(3
+1
)÷4]÷2.5=
| 1 |
| 2 |
| 23 |
| 24 |
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| 3 |
1
1
.分析:这是一道关于整数、小数、分数、百分数混合运算的题目,运算时注意它们之间的转化.
解答:解:[(6.875-2
)×25%+(3
+1
)÷4]÷2.5,
=[(6
-2
)×
+(3
+1
)×
]÷2.5,
=[
×
+
×
]×
,
=[(
+
)×
]×
,
=[10×
]×
,
=10×
×
,
=1.
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| 2 |
| 23 |
| 24 |
| 2 |
| 3 |
=[(6
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| 8 |
| 1 |
| 2 |
| 1 |
| 4 |
| 23 |
| 24 |
| 16 |
| 24 |
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| 4 |
=[
| 35 |
| 8 |
| 1 |
| 4 |
| 135 |
| 24 |
| 1 |
| 4 |
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=[(
| 35 |
| 8 |
| 135 |
| 24 |
| 1 |
| 4 |
| 2 |
| 5 |
=[10×
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| 4 |
| 2 |
| 5 |
=10×
| 1 |
| 4 |
| 2 |
| 5 |
=1.
点评:此题考查学生关于整数、小数、分数、百分数混合运算能力,以及相互转化的熟练程度.
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