已知
,
,则代数式
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4c348427f18a9e3520f93cc6b21aa1e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e1e9f961bd4e1fe35e706384048b34b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/093877ef928d1aaf08583bbaac95f69d.png)
更新时间:2019-02-20 08:36:51
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【知识点】 已知式子的值,求代数式的值解读
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较难
(0.4)
【推荐1】如果x-y=1,m+n=5,则 (y+m)-(x-n)的值是____________ .
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名校
【推荐2】一个四位数
(其中
,
,
,
,且均为整数),若
,且
为整数,则称
为“
型数”.例如:
,因为
,则
为“
型数”;
,因为
,则
为“
型数”.若四位数
是“
型数”,
是“
型数”,将
的百位数字与十位数字交换位置,得到一个新的四位数
,
也是“
型数”,则满足条件的最小四位数
的值为________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c58ad2943ac43e6a8a0193eaf9fd8ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ca7d1107389675d32b56ec097464c14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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