2024七年级下·安徽·专题练习
1 . (1)解方程:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6e9dd2d0b2d5ae514d36c52fa2e968.png)
(2)化简:
,然后在不等式
的非负整数解中选择一个适当的数代入求值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f6e9dd2d0b2d5ae514d36c52fa2e968.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67cedaabb1f7d343c3fe940b499baf01.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f417f76e2e7eb5231d8e90fb85c5b17.png)
您最近一年使用:0次
2 . 计算:
(1)解一元一次不等式组:
;
(2)解方程:
﹣
=1.
(3)先化简,再求值:
,其中
.
(1)解一元一次不等式组:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6b82fb49477cb5e8c8dd2ba16f940d3.png)
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e2a19e049e3e4ddfaecc03b9d1dda61.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c764320d6f9e1812818497e1ed79d0fd.png)
(3)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/69bf3048cc966e4836c68d8875025c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fbf6145d0cd5bc4097fee547053788c3.png)
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3 . (1)解方程组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fb63da591653edf3abe88a8e0c140e.png)
(2)解不等式组
请结合题意完成本题的解答(每空只需填出最后结果).
解:解不等式①,得______,
解不等式②,得______,
把不等式①和②的解集在数轴上表示出来,
所以原不等式组解集为______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05fb63da591653edf3abe88a8e0c140e.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ade514a4a2bf8f53469ed623b17eabc.png)
解:解不等式①,得______,
解不等式②,得______,
把不等式①和②的解集在数轴上表示出来,
![](https://img.xkw.com/dksih/QBM/editorImg/2023/7/18/3422e41e-b900-48f7-997a-17f5cb442248.png?resizew=267)
所以原不等式组解集为______.
您最近一年使用:0次
4 . (1)解方程组
;
(2)解不等式组
,请结合题意完成本题的解答(每空只需填出最后结果).
解:解不等式①,得__________,
解不等式②得__________,
把不等式①和②的解集在数轴上表示出来;
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270149996437504/3277922584387584/STEM/712094ee9984479693e13d7e29ee7da0.png?resizew=237)
所以原不等式组解集为__________.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3f1cb74cd45afedec5b8c593bdf272e.png)
(2)解不等式组
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/42673caf22a5c3462d2ab52728626142.png)
解:解不等式①,得__________,
解不等式②得__________,
把不等式①和②的解集在数轴上表示出来;
![](https://img.xkw.com/dksih/QBM/2023/6/29/3270149996437504/3277922584387584/STEM/712094ee9984479693e13d7e29ee7da0.png?resizew=237)
所以原不等式组解集为__________.
您最近一年使用:0次
5 . (1)解不等式组![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424d0be05241eae8693b87792e0c4b25.png)
解:①解不等式①,得 ;
②解不等式②,得 ;
③把不等式①和②的解集在数轴上表示出来:
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962517400100864/2964391790436352/STEM/61b01475-010b-4721-8d66-8fc99b6efaa9.png?resizew=270)
④原不等式组的解集为 .
(2)解方程:
+1=
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424d0be05241eae8693b87792e0c4b25.png)
解:①解不等式①,得 ;
②解不等式②,得 ;
③把不等式①和②的解集在数轴上表示出来:
![](https://img.xkw.com/dksih/QBM/2022/4/20/2962517400100864/2964391790436352/STEM/61b01475-010b-4721-8d66-8fc99b6efaa9.png?resizew=270)
④原不等式组的解集为 .
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ebfca5d354cde868ef6477d499263b3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/611b3a50609360bdadb0e2d68301de1c.png)
您最近一年使用:0次
6 . (1)解方程:
.
(2)先化简,再求值:
,其中x值为(1)中方程的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ddd704ba67855eb14140057a748c5f8c.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46c1b8e1bcdc79f6764d7419a0828127.png)
您最近一年使用:0次
7 . 方程与计算
(1)解方程:①
;②![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44393ec0584affbac9050b27722224.png)
(2)先化简,再求值:
,其中a取不等式
的任意一个整数.
(1)解方程:①
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b4e4f5a72c45fd8e9d6d2726a09bdf2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d44393ec0584affbac9050b27722224.png)
(2)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dcb872be43896bea7788353390971e19.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/36724703b23cb5ccf39ea345b28d7901.png)
您最近一年使用:0次
8 . (1)解不等式:
.
(2)写出二元一次方程
的一组解.
(3)先化简,后在给出的x的值中选择一个代入求值:
,其中x的值为
,2,3.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3867c86a88dc0634fa55719e150f206.png)
(2)写出二元一次方程
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2452a7c33b76eb4d56f32926b9cdf28f.png)
(3)先化简,后在给出的x的值中选择一个代入求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0ba5e5a81c8e51720c2a221c6aa44620.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/acbc6a613224461ade69362d46550474.png)
您最近一年使用:0次
9 . 计算:
(1)
;
(2)先化简:
,然后从0,1,2,3中选择你喜欢的x值带入求值.
(3)解方程:
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21fa651ed52d9a9661d24fa266ea899b.png)
(2)先化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/393d466789f862f6e7c97e65e134ea27.png)
(3)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b9790843c5bdc305fdafdb321d643c3.png)
您最近一年使用:0次
10 . (1)解不等式组:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95515f7d56c4c6e9de951749c67c8cb5.png)
请结合题意填空,完成本题的解答
(I)解不等式①,得______________________;
(Ⅱ)解不等式②,得______________________;
(Ⅲ)把不等式①和②的解集在数轴上表示出来:
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725305469157376/2741495660363776/STEM/298e064b-ab0e-4c4d-b842-96b4281877ed.png)
(Ⅳ)原不等式组的解集为______________.
(2)解方程:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/95515f7d56c4c6e9de951749c67c8cb5.png)
请结合题意填空,完成本题的解答
(I)解不等式①,得______________________;
(Ⅱ)解不等式②,得______________________;
(Ⅲ)把不等式①和②的解集在数轴上表示出来:
![](https://img.xkw.com/dksih/QBM/2021/5/20/2725305469157376/2741495660363776/STEM/298e064b-ab0e-4c4d-b842-96b4281877ed.png)
(Ⅳ)原不等式组的解集为______________.
(2)解方程:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5f99923176b09994abd053716f6535d2.png)
您最近一年使用:0次
2021-06-12更新
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106次组卷
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2卷引用:2021年河南省许昌市中考二模数学试卷