1 . 定义新运算:对于两个不相等的实数
,我们规定符号
表示
中的较大值,如:
,
.按照这个规定,若
,则
的值是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67f0570f04cc4d5321257dbcf0dee4b5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f59e4fbd62e08f014afb77ce800183a4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0a8912ff772c05de8f6f866326243eb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85dc7c7e48c150094c06fe17167714bf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
A.![]() ![]() | B.![]() | C.![]() | D.![]() ![]() |
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2 . 规定运算符号“
”的意义如下:
,例如:
,则
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/617e915d40a9ee79e9acc5b4d03022e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/945910e363829407507ce858adf74386.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2438cb05e14bb6d6870bf33db2ae5a58.png)
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名校
3 . 若定义一种新运算“
”:
,如
.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd94e5c210921dfbe11796b1fc97cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/34dcf08d686803426cca5b821818ed84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c147a89cc63f4be9fe3cdea8cca6c08.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ea4a10a420f5361921e56b9613e2af9.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ba607ed5fbf6e3381a16dcc3ba13dbdf.png)
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2023-09-25更新
|
104次组卷
|
2卷引用:山东省淄博市高青县2023-2024学年六年级上学期期中数学试题
4 . 规定一种新的运算
,如
,则
的值为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/739ca115a772a572a8a32491ce4a0a64.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c8eaf43be84ea5c57232f9172837da01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/86d0e8b4ba3817ac67a327f6a5e78cc2.png)
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5 . 我们知道,每个自然数都有因数,对于一个自然数
,我们把小于
的正的因数叫做
的真因数.如10的正因数有1、2、5、10,其中1、2、5是10的真因数.把一个自然数
的所有真因数的和除以
,所得的商叫做
的“完美指标”.所以,16的“完美指标”是________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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6 . 用“
”表示一种运算符号,其意义是
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ce430dccc06138e1f8d31f0be3354e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22c5aa13994e27202ef99e8348bb881b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ec0618ae3a4fde6d6220010af229b9a.png)
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7 . 设
,
是两个数,规定
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c999721130dad9ac9059ad18335d4f.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/19bbcdd96c557e7d1622bad76a9a436c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54c999721130dad9ac9059ad18335d4f.png)
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8 . 一个四位正整数A,若千位数字与百位数字之和为7,十位数字与个位数字之和为8,且十位数字不为0,则称A为“七上八下数”,如果把A的前两位数字和后两位数字整体交换得到新的四位正整数B,规定
.例如:
,
,
,
为“七上八下数”,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e39c5feadf9724fdf6e1f39b134367a.png)
(1)若C为最小的“七上八下数”,则C为______,并求出其对应的
的值;
(2)某“七上八下数”A,若A与其对应的
之和能被51整除,求这个“七上八下数”A.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c042be023f63b46e3633904ea76d2f25.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c640465e6494a921144e472eee23df2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94a9ee399e2c339c8303c5de7eedd01e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc405ed2c61b01eef406a4b8e4550e94.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ef6814ef5a12723aaa4bfa06f654a0e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4e39c5feadf9724fdf6e1f39b134367a.png)
(1)若C为最小的“七上八下数”,则C为______,并求出其对应的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aeb733bba7ed680f11d439018c0ba431.png)
(2)某“七上八下数”A,若A与其对应的
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e01f11f9361a48ad480e079a2216354c.png)
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2023-01-16更新
|
505次组卷
|
2卷引用:人教版(五四制)六年级下册数学 第8章 整式的加减 单元测试卷
9 . 在有理数的原有运算法则中,补充新的运算法则“
”如下:当
时,
;当
时,
.则当
时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35ab36dca86f1d759ae686e6874a483.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fd94e5c210921dfbe11796b1fc97cee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1132de2e8913dba9c5cc2396ecb09fcf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0b25c3b680952ee9054a498174a545d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ab3c489141f23eaebeee4b38df7cb984.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e55aa0a20848c37c1892c567b2315e04.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f35ab36dca86f1d759ae686e6874a483.png)
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2022六年级上·上海·专题练习
10 . 对于自然数n,如果能找到自然数a和b,(均不为0)使得
,那么n就称为“好数”.如
,所以3是“好数”.在1到100这100个自然数中,有多少个“好数”?
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