1 . 计算
(1)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1bd0fec6b4210be3770933323a23f0f4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/730e73652c7959ee51ee4ddf5f32dbc8.png)
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2 . 计算:
(1)
;
(2)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5649a0ef2f4843aba54bb6f807caa262.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7003f807b72b56dd91b472e18f70b83e.png)
您最近一年使用:0次
名校
3 . 我们把形如
(
,
为有理数,
为最简二次根式)的数叫做
型无理数,如
是
型无理数,则
是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9b38b847009da1e4a97f93fc87f07f7.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/f457e696b1504bfb73140699a8e18dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f457e696b1504bfb73140699a8e18dd0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2c663b6eac3416a9c9c631a88040c65d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e005b10d89d937410630178131be6f88.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2020-05-12更新
|
100次组卷
|
2卷引用:浙江省绍兴市元培教育集团2018~2019学年八年级下学期期中数学试题
4 . (1)
;
(2)
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/04c8872652cd250a91a1b5b6e433c99e.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f2c8e88a2b91c7d39c8f75fc227caf4e.png)
您最近一年使用:0次
2020-05-10更新
|
83次组卷
|
6卷引用:浙江省绍兴市新昌县2020-2021学年八年级下学期期中数学试题
浙江省绍兴市新昌县2020-2021学年八年级下学期期中数学试题浙江省绍兴市越城区建功中学2020-2021学年八年级下学期期中数学试题浙江省宁波市奉化区锦屏协作区2019-2020学年八年级下学期期中数学试题(已下线)【新东方】【2021.5.19】【SX】【初二下】【初中数学】【SX00020】(已下线)【新东方】【2021.5.19】【SX】【初二下】【初中数学】【SX00005】(已下线)【新东方】初中数学20210622-036【初二下】
5 . 计算
(1)
;
(2)
;
(3)已知:x=1﹣
,y=1+
,求x2+y2﹣xy的值.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3ef4046e09f4c1f218b144a718ba25c2.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/effd9cb85620c8fbbc13a0747ebf6e86.png)
(3)已知:x=1﹣
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
您最近一年使用:0次
2020-05-07更新
|
124次组卷
|
2卷引用:浙江省绍兴市越城区绍初教育集团2019-2020学年八年级下学期期中数学试题
6 . 化简或计算:
(1)
;
(2)
;
(3)
.
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e76b0a61d4adb30b52b49cc611044041.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7be73a327eb0ae8516a5940d9f3567e8.png)
(3)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/30f73ce1faf3dffe5125c10b77c9666e.png)
您最近一年使用:0次
7 . 计算:
(1)![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265372d70386a15dab720391fde63de5.png)
(2)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/265372d70386a15dab720391fde63de5.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a23a5ecc0dba9402a4ded34f8f63892f.png)
您最近一年使用:0次
2020-04-15更新
|
161次组卷
|
2卷引用:浙江省绍兴市柯桥区2020-2021学年八年级下学期期末数学试题
8 . 下列计算正确的是( )
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
9 . (1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d4d8cf95d3f44e9d8d4527387d3c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0d8920757124b65e9ef338757fee69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24071f5b19216e3fb33cff5a97ef6ad.png)
(2)已知 a
1 , b
,求代数式 a2+b2-2a+1 的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/94d4d8cf95d3f44e9d8d4527387d3c06.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd0d8920757124b65e9ef338757fee69.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f24071f5b19216e3fb33cff5a97ef6ad.png)
(2)已知 a
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
您最近一年使用:0次
10 . 计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5bb23aae2bc1fb9de7f5fa0f468dccb3.png)
您最近一年使用:0次