1 . 阅读以下材料,完成相关的填空和计算.
(1)根据倒数的定义我们知道,若
,则
__________;
(2)计算:
;
(3)根据以上信息可知
=________.
(1)根据倒数的定义我们知道,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/77954d816ae208412c8289768752cb93.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4734964c38036470d1fe104eab3886f9.png)
(2)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00ef2e74661ba4847dd1f4cadc4f012d.png)
(3)根据以上信息可知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad1f489d9182bb72349e4b925eb6750f.png)
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2 . 若
、
互为相反数,
、
互为倒数,
的绝对值为
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](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/ac51b255b697be91435dff61b4d68bee.png)
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3 . 已知a,b互为相反数,c,d互为倒数,m的绝对值为3.
(1)求
的值;
(2)求
的值.
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a18e5faba4267887099f90e0f3a4d882.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c2a2751c1f3453e4ec619a00cf29b908.png)
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4 . (1)已知a是
的倒数,b的相反数比a小2,求
的值;
(2)先化简,再求值:
,其中
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3ffd5c35bba71ea54c28622b6cf505d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca4382d730ee25572d29752ed3a2857a.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3e13de46334f31cb8bf0f7a2bb7c709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6b108ab31cc093f03cf48ad65429889e.png)
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5 . 若
,
互为相反数,
,
互为倒数,
的绝对值是
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c94bb12cee76221e13f9ef955b0aab1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071a7e733d466949ac935b4b8ee8d183.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5c02bc0c74292b1e8f395f90935d3174.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/61128ab996360a038e6e64d82fcba004.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe47d2fcba118faf643f843412269d21.png)
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6 . a,b为相反数,c,d互为倒数,数轴上表示m的点到原点距离为3,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1b7d1b76232d89589f400f374f0042fa.png)
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7 . 请根据图示的对话解答下列问题.
______,
______.
(2)已知
,求
的值.
已知
与
互为相反数
与
互为倒数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b962fa46f533a4e1b47d5363e1bb5d1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019d4ad2e3fb4a7abb66e0e9e55b556.png)
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8 . 对于任意有理数a,b,定义一种新运算:
,等式右边是通常的加法、减法运算,如:
.
(1)求
的值;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e662b5901588fb9307cdfa4fcd71b985.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f73a2701eed3e7d361b4c4b66b17c63.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42e9077c043a81ab48d2fe3cbf692ac8.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a88c7f33e363af4525e31d566e991ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
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2024-03-02更新
|
177次组卷
|
3卷引用:吉林省长春市朝阳区长春力旺实验初级中学2023-2024学年七年级下学期学期数学3月月考试题
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9 . 求下列各式的值.
(1)若a与b互为相反数,c与d互为倒数,x的绝对值等于5,求
的值;
(2)若
的立方根是3,
的算术平方根是4,求
的平方根;
(3)如图,在
方格中阴影正方形的边长是 ,它的整数部分是 ,小数部分是 (小正方格的边长为1个长度单位).
(1)若a与b互为相反数,c与d互为倒数,x的绝对值等于5,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ed0e3f7691e5ee31c9c92b4a8d46018.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4001cd4bf0f6870d53fe2dabd3cf45c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8026dfb85e7f0b298fe9cf3cf670f5b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/037f840ede17e2a54519ed0cafa426ba.png)
(3)如图,在
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16b91b84cf6c19db7fb12b6964ba46c6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/1/f775b194-3c46-4fcc-8efc-ef7b580646c8.png?resizew=101)
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10 . 如果a,b互为相反数,c,d互为倒数,m的绝对值为2,求:
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febe08df5b097a91ba10530a9ddfad5.png)
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