(1)若
,求
的值;
(2)已知有理数a,b,c在数轴上对应位置如图所示:
①用“<”或“>”填空:
___________0,
___________0;
②化简:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a96e95bbddfddf778bb811b5ef3dad52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/be3944d13a394c1cf0085ff3dd6d9d76.png)
(2)已知有理数a,b,c在数轴上对应位置如图所示:
①用“<”或“>”填空:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd1810555c0c28fe352841322b85bbc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9db8d3facff8f90f28a936fc5b3ab878.png)
②化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54cf76a532c785147d6efbd7ea158096.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/3/1aca40c6-1686-44ea-b50c-6aba79f090fc.png?resizew=261)
22-23八年级上·四川成都·阶段练习 查看更多[2]
更新时间:2022-10-31 23:17:58
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【推荐1】对于有理数a,b,定义一种新运算“#”,规定a#b=|a+b|+|a﹣b|.
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【推荐2】若a,b,c在数轴上的位置如图所示,化简
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【推荐2】已知x、y、z都是不为0的有理数,且满足![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6f1426725fa03deb9cc35c3885e9ac96.png)
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解答题-问答题
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【推荐2】如图,
、
分别是
轴负半轴、
轴正半轴上两点,
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/3/6453d92c-f2fe-4809-bfd4-6f54797774d0.png?resizew=594)
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(1)若
![](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/57a48536732792b4eb1506f2464f8dc2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
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(2)如图
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