若
,
互为相反数,
,
互为倒数,
的绝对值为
.
(1)
,
,
.
(2)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)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c972205b7d47a23c250f3234f487c845.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1a86ffcc54a2e446c752d8115e6b1158.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b31463b348f21711420670df9d7d03a8.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e98f60b919de4d7e8a518d2220de8b5.png)
更新时间:2024-03-13 20:08:54
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【推荐1】请根据图示的对话解答下列问题.
![](https://img.xkw.com/dksih/QBM/2022/11/9/3105997076332544/3123195395055616/STEM/350256c20b024f6a84ddc5d37c386cc9.png?resizew=458)
(1)a=______,b=______;
(2)已知
,求
的值.
![](https://img.xkw.com/dksih/QBM/2022/11/9/3105997076332544/3123195395055616/STEM/350256c20b024f6a84ddc5d37c386cc9.png?resizew=458)
(1)a=______,b=______;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/27516f2795d665b4cb57a954d73af61c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6bb86e9198d21a055127c3f6b36520fc.png)
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【推荐2】请根据图示的对话,解答下列问题.
我不小心把老师布置的作业题弄丢了,只记得式子是![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3630204f4793d00f0a19406ed18d68b.png)
我告诉你,a的相反数是2,b的绝对值是6,c与b的和是
.
(1)直接写出a,b的值.
(2)求
的值.
![](https://img.xkw.com/dksih/QBM/2022/11/9/3105800596946944/3151420372672512/STEM/8f854374877548b3845fe42ce8e6122f.png?resizew=67)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3630204f4793d00f0a19406ed18d68b.png)
![](https://img.xkw.com/dksih/QBM/2022/11/9/3105800596946944/3151420372672512/STEM/6390904530e24b01982281c0c1d7497c.png?resizew=70)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32e22e1223baf7cb3d53e668c2449609.png)
(1)直接写出a,b的值.
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3630204f4793d00f0a19406ed18d68b.png)
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【推荐1】先化简,再求值:
,其中x,y互为相反数,且x是倒数是它本身的自然数.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe64b14405c023fb198d6a86b7e4d3ce.png)
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【推荐2】有理数
在数轴上的位置如图所示.
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/78d90bab-0e65-4932-bf90-1c44cd55ceb0.png?resizew=375)
(1)用
或
填空:
______0,
______0;
(2)去绝对值符号:
______;
______;
______.
(3)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/663a61ad241d5d874c9a9362f0ee917c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/3/78d90bab-0e65-4932-bf90-1c44cd55ceb0.png?resizew=375)
(1)用
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/392cdb9d30684cce244bef94b8d861b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ff7942da6c3fc4005256fb1458557c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7fa17a39f52e09981729af4439ca535.png)
(2)去绝对值符号:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e7fdea1a46c477cb34feb8f33fb00fa.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/376d7cc8de5d27ca0526bfbf2181b875.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b5c54cff1432c8222576cb72613e92b4.png)
(3)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e4c91abe4aa92965a94ff0a1875be7d.png)
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【推荐1】根据下列语句列式并计算:
(1)
与
的绝对值的和
(2)
的相反数和
的倒数的商
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/22bd1cc848d9283216c78eaa0c5323fd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bd87a4d2ab9f959dfce41104628336d.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/212d6e1f4d7dcc0e5e902c46e3b1dfcc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/459c84c9addfbd1cdd0a877ba7c584e4.png)
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【推荐2】若
互为相反数,
互为倒数,
.
(1)填空:
______;
______;
______.
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/632244ea6931507f8656e1cc3437d392.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca31577dd76afbc1b720cdcad88ffd16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfc3a73eea58b9b5568875769833fd6a.png)
(1)填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/892560dcff6af9f66a3f735652f69dd7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f56c7629163c5fe76b2c5990d7ac1f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c57bbef89a37f1a3808c0ceeac0c22.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/de14d563db939f19a97e46849c5aa9e2.png)
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【推荐1】已知x2+5x=﹣2,求代数式(2x+3)2﹣x(x﹣3)的值.
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【推荐2】运用整体思想在代数式求值中经常会有用到.
例如:已知
,则代数式
.
请你根据以上材料解答以下问题:
(1)若
,则
______;
(2)已知
,
,则
______;
(3)当
,
时,代数式
的值为8,
则当
,
时,求代数式
的值.
例如:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc5e3fde4781006e0bfe3e7f2d70764.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/867cf2525856bac65dd6b13eb93b3e25.png)
请你根据以上材料解答以下问题:
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f8be9c94bc83d3e61a9195386c6e8fca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/935a198610f530171f9846ffce4e7e3d.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dfad3b64115f78d98a5f40252f24d989.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c9ff351af8e23afda17cc632de72f41.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac070a66deaf516228f71c41385e10c1.png)
(3)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99c6875d552e9fff3c7d655f3a59b166.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/107babba45f110012183dc4dc54490f7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5fa6b291029fb3f3c7dc8a92edff19.png)
则当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b384412acba251d87902ab928902f16.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cd24f3c4bc9f9a75d4b28630bb630d2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5fa6b291029fb3f3c7dc8a92edff19.png)
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