若一个各数位数字不为0的四位数
,
的千位数字与百位数字的和等于其十位数字与个位数字两倍的和,则称这个四位数
为“双丰数”,将“双丰数”
的千位数字与百位数字对调,十位数字与个位数字对调得到新数
,并记
,则最小的“双丰数”为________ ;若四位数
(
,
,
,
,
,
,
,
为整数)为“双丰数”,且
能被9整除,令
,则在所有满足条件的“双丰数”
中,当
值最小时的“双丰数”为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f817b4de0d38bf873f30318755d55c83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e1e07c53fdff2b5d988a8226dca78e1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/669b9a32dbbf8810c5e9e69f28bac4d3.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
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更新时间:2024-01-21 17:46:41
|
【知识点】 新定义下的实数运算
相似题推荐
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【推荐1】对非负实数x“四舍五入”到个位的值记为(x).即当n为非负整数时,若
,则(x)=n.如(0.46)=0,(3.67)=4.
给出下列关于(x)的结论:
①(1.493)=1;
②(2x)=2(x);
③若(
)=4,则实数x的取值范围是9≤x<11;
④当x≥0,m为非负整数时,有(m+2019x)=m+(2019x);
⑤(x+y)=(x)+(y);
其中,正确的结论有__________ (填写所有正确的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/692f19277572dc695f32be2f6b683c06.png)
给出下列关于(x)的结论:
①(1.493)=1;
②(2x)=2(x);
③若(
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/863df269c1471b917fb15bc6a1cd2265.png)
④当x≥0,m为非负整数时,有(m+2019x)=m+(2019x);
⑤(x+y)=(x)+(y);
其中,正确的结论有
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【推荐2】对于任意一个四位数m,若它的千位数字与个位数字均不为0,且满足千位数字与个位数字的差等于百位数字与十位数字的差,则称这个四位数m为“博雅数”.将“博雅数”m的千位数字与个位数字交换,百位数字与十位数字交换,得到m的逆序数
,并记
.
例如:
,因为
,
,
,所以3421是“博雅数”;4512不是“博雅数”,因为
.若x,y都为“博雅数”,记x的千位数字与个位数字分别为p,
,y的千位数字与个位数字分别为s,t,其中
,
,
,p,
,s,t均为整数.若
能被8整除,
,则所有
的可能值的和为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7093538ecfb10a639b23863e7331a66d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20bf5585721038c304b131d876944e76.png)
例如:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/426c3d4df8ee91aa01fe16bdd279b549.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dee23ae4fda682cc14196c6713ed79d8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/501177256730724788eff599401f0176.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a26d111682929d37dd314807309d9b88.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/310bd67f2662c620c6d70b11556ea105.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7a940fcc49ebe855dcc79fc3cb6ba25a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18b879ff83bc07ee5ea4cbb4fec03bff.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a002620e40df9da8bd86c9d7fae6761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9aa8a716a31b0f51b70fdf9bdb257909.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46be55c8f2760d6db125f46691a3de48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f1c3c60a6bf3c8dfab410594f5bf8ccb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6af287ead9fef61e95107a6e265ce412.png)
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