“分类讨论”是一种重要数学思想方法,请运用分类讨论的数学思想解决下面的问题:
(1)已知
,
,且
,求
的值;
(2)已知a,b是有理数,当
时,求
的值.
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3dabe8a423834b087bab8e8d07401247.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcea0b46263f53fa9270a05b9df30992.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c6a46e678bf9d2df5ad4c782b3dc22f5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
(2)已知a,b是有理数,当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9eae9ba258299eb489b490594397e23c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/05964e627685e33cc52da4698262d489.png)
21-22七年级上·江苏南通·期中 查看更多[3]
(已下线)江苏省南通市如皋市2021-2022学年七年级上学期期中数学试题江苏省南通市如皋市石庄镇初级中学2022-2023学年七年级上学期第一次月考数学试题(已下线)第05讲 有理数混合计算(6种题型)-2022-2023学年七年级数学上学期考试满分全攻略(苏科版)
更新时间:2021-11-10 18:09:49
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相似题推荐
解答题-问答题
|
适中
(0.65)
【推荐1】已知
,
和
互为倒数,
和
互为相反数.
(1)求
的值;
(2)求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fb35983bcf0333337d569a7b146742d8.png)
![](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)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/46dd43462fbda7a4c72ff1ce4ae430a1.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】若a、b互为相反数,c、d互为倒数,m的绝对值为2.
(1)直接写出
,
,
的值;
(2)求
的值;
(3)若
,直接写出a,b,c,d的值.
(1)直接写出
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d6fc9b90f370fbb27552876b650f8f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d6c5ec685e8420a8672cefa43e45869.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/294f5ba74cdf695fc9a8a8e52f421328.png)
(2)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0449ca218eb94fe4d5116aa95f8386df.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec121848bc485b45eec1a45e8735227e.png)
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解答题-计算题
|
适中
(0.65)
【推荐1】计算:
(1)(﹣7)×(﹣5)﹣90÷(﹣15)
(2)(﹣1)3﹣(1﹣
)÷3×[(﹣2)2﹣5]
(3)(﹣1
)2×
÷|﹣3|+(﹣0.25)÷(
)6
(4)﹣32﹣12×(﹣
)+4÷(
)
(1)(﹣7)×(﹣5)﹣90÷(﹣15)
(2)(﹣1)3﹣(1﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(3)(﹣1
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
(4)﹣32﹣12×(﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/88b995450a70d096bb2acf727c110364.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/70b15cf9f7b13a721ef8a2f1be10f527.png)
您最近一年使用:0次
解答题-问答题
|
适中
(0.65)
【推荐2】直接写出得数:
(1)
________
(2)
________
(3)
________
(4)
________
(5)
________
(6)
________
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9ee9f7280c3764fd0f71dbc66a53ae2e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/624da161b1ff9906c5c2c1f51bfbb65b.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/151ddd2bea13f0845611c4c500f17b93.png)
(4)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/769efba10950d42f7cfafbdc5b4ddbe6.png)
(5)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8ca5cef13e8f019525daac6ac238f1a7.png)
(6)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/edcdd25f4090d72ce10af238fd57b51f.png)
您最近一年使用:0次