已知|x|=
,y是11的平方根,且
>
,求x+y的值.
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d053b14c8588eee2acbbe44fc37a6886.png)
21-22七年级下·江苏南通·阶段练习 查看更多[7]
江苏省南通市如皋市实验初中2021-2022学年七年级下学期3月月考数学试题(已下线)第12讲 实数有关概念及性质-【暑假自学课】2022年新八年级数学暑假精品课(苏科版)(已下线)专题13实数(6个知识点4种题型5个中考考点)-【帮课堂】2023-2024学年八年级数学上册同步学与练(苏科版)(已下线)第4章 实数全章复习攻略与检测卷(6个概念2种运算1个关系1个分类3种思想)-【帮课堂】2023-2024学年八年级数学上册同步学与练(苏科版)(已下线)专题02 实数全章高频考点(考点清单,3个概念1个关系3个性质1种运算1个技巧2种思想专练)-2023-2024学年七年级数学下学期期中考点大串讲(人教版)(已下线)第6章实数全章复习攻略(3个概念1个关系3个性质1种运算1个技巧2种思想专练)(原卷版)(已下线)专题02实数全章复习攻略(3个概念1个关系3个性质1种运算1个技巧2种思想专练)-2023-2024学年七年级数学下学期期末考点大串讲(人教版)
更新时间:2022-03-25 08:55:52
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【推荐2】根据下表回答问题:
(1)272.25的算术平方根是 ;
(2)
,
,
;
(3)设
的整数部分为a,求
的平方根.
x | 16 | 16.1 | 16.2 | 16.3 | 16.4 | 16.5 | 16.6 | 16.7 | 16.8 |
x2 | 256 | 259.21 | 262.44 | 265.69 | 268.96 | 272.25 | 175.56 | 278.89 | 282.24 |
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/addf3f3e2f51cea8dd5fecf966ff50ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04a2c6e783fe8dd9215d7dc47471f1f3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d1f9e0338cf8ed2037b949718991b906.png)
(3)设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/31739569d15b39cfb0ad256b3f8ff267.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0d2a7b13d95229e2e938514739054541.png)
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【推荐2】因式分解:
(1)
.
(2)
.
(3)
;(在实数范围内分解因式)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d77fe9e0b3c6981a8fbce640c9adef4.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81cbe2db52f970306ebdc49dbfc2cc8d.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a51f27a60bf6ae13877b9ff5ace0d64b.png)
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【推荐1】已知:在数-
,-
,π,3.1416,
,0,42,(-1)2n,-1.424224222…中,
(1)写出所有有理数;
(2)写出所有无理数;
(3)把这些数按由小到大的顺序排列起来,并用符号“<”连接.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b2a698891d42c70b597f0da4f215f09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79b08d0871918628d2b44c37ed3fc6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf31876698721a199c7c53c6b320aa86.png)
(1)写出所有有理数;
(2)写出所有无理数;
(3)把这些数按由小到大的顺序排列起来,并用符号“<”连接.
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【推荐2】已知七个实数
,
,4,
,
,0,
.其中五个数已在数轴上分别用点
、
、
、
、
表示.
表示数______,点
表示数______,点
表示数______,点
表示数______;
(2)在数轴上准确地表示数
(提示:注意观察正方形
的面积),并将所有的数用“<”连接;
______<______< 0 <______<______<______<______.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071ff10740d0ef09e9b6ab0bf8a92283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4b8503f4706b8321e4e79a87eadea84.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01092c5ea6ead58aa66bc6f95d19c142.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
(2)在数轴上准确地表示数
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/071ff10740d0ef09e9b6ab0bf8a92283.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3e0d75422e2e1ae0ed77f764cb47d375.png)
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