计算:
(1)
;
(2)
.(利用乘法公式)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d80b4dcd2c1f01a0c320664b160a4a1.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b1b9f9f095ed99fd4d977c29c91e2b86.png)
22-23七年级下·福建三明·期中 查看更多[3]
福建省三明市永安市2022-2023学年七年级下学期期中数学试卷(已下线)综合复习与测试(2)(计算化简求值100题)(巩固篇)(专项练习)-2022-2023学年七年级数学下册基础知识专项讲练(北师大版)山东省济南市天桥区济南第二十九中学2022-2023学年七年级下学期期中数学试题
更新时间:2023-04-11 10:00:11
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解答题-问答题
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适中
(0.65)
【推荐2】阅读材料:已知
,
,求
的值.
∵
,
,∴
.
请你参考上述材料解答下面问题:
(1)已知
,
,求
的值.
(2)已知
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3afa2581caf03310eeb7075374ce8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f2f9cbd865f11cecf4bd44fb029bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c4825710d80fbfc8da2321f186192b.png)
∵
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c3afa2581caf03310eeb7075374ce8da.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5f2f9cbd865f11cecf4bd44fb029bef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2312d3cf5b86262e43de57d24be1c461.png)
请你参考上述材料解答下面问题:
(1)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99e9834bd32f0a86dc646dd6f3f9319e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2559b71aa468497a70dc696c475f7b2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d6c4825710d80fbfc8da2321f186192b.png)
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6191789e93d13be99cbbc2f5fad124d5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2cc2fe4a4025f845fe0661aaf98679a3.png)
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解答题-计算题
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适中
(0.65)
【推荐1】计算下列各小题.
(1)a3•a5+(﹣a2)4﹣3a8;
(2)(﹣1)2021+(π﹣3)0﹣(﹣
)×|﹣6|;
(3)2x(x﹣4)﹣(3x﹣1)(x+3);
(4)[(m+n)(m﹣n)+(m﹣n)2]÷(﹣m).
(1)a3•a5+(﹣a2)4﹣3a8;
(2)(﹣1)2021+(π﹣3)0﹣(﹣
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(3)2x(x﹣4)﹣(3x﹣1)(x+3);
(4)[(m+n)(m﹣n)+(m﹣n)2]÷(﹣m).
您最近一年使用:0次
解答题-计算题
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适中
(0.65)
【推荐1】按要求完成下列各题:
(1)计算:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7cae943c6612125e29a82767002a0b.png)
(2)化简:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f4816c873fd37b677cfca356417280.png)
(3)先化简,再求值:
,其中
(1)计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d7cae943c6612125e29a82767002a0b.png)
(2)化简:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e45bcd8f6ede8cc2513ad41402f40086.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8f4816c873fd37b677cfca356417280.png)
(3)先化简,再求值:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d68f8e1a92dcb66694a9e5802d775729.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/37e9222ffc26c0e6bfbf252ab5d8a520.png)
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适中
(0.65)
【推荐2】(1)已知
和|8b-3|互为相反数,求(ab)-2-27的值;
(2)先化简,再求值:(a+b)2+(a-b)(2a+b)-3a2,其中a=2+
,b=
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3803381436fa2afdc8ce24d35bf34de3.png)
(2)先化简,再求值:(a+b)2+(a-b)(2a+b)-3a2,其中a=2+
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您最近一年使用:0次