从边长为a的正方形中剪掉一个边长为b的正方形(如图1),然后将剩余部分拼成一个长方形(如图2).
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132697441509376/3139210327580672/STEM/a7002401ae4240e1b36208a44189ac0a.png?resizew=327)
(1)上述操作能验证的等式是 .(请选择正确的选项)
A、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b16d88920d1bd8c826a0d4980efb737.png)
B、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e516164bc710da837f57e7d2b5a0b8e.png)
C、![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32eca138eebfb96e79bea87fdb8955b.png)
(2)用你选的等式进行简便计算:
;
(3)用你选的等式进行简便计算:
.
![](https://img.xkw.com/dksih/QBM/2022/12/17/3132697441509376/3139210327580672/STEM/a7002401ae4240e1b36208a44189ac0a.png?resizew=327)
(1)上述操作能验证的等式是 .(请选择正确的选项)
A、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3b16d88920d1bd8c826a0d4980efb737.png)
B、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1e516164bc710da837f57e7d2b5a0b8e.png)
C、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c32eca138eebfb96e79bea87fdb8955b.png)
(2)用你选的等式进行简便计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c210c65c2d86cc2f00869a8cfde72c42.png)
(3)用你选的等式进行简便计算:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3cc0d59af395a375a26c129148e9f57.png)
21-22七年级下·江苏盐城·阶段练习 查看更多[6]
江苏省盐城市大丰区飞达路初级中学2021-2022学年七年级下学期第一次学情检测数学试题(已下线)14.2.1 平方差公式(练习)-2022-2023学年八年级数学上册同步精品课堂(人教版)(已下线)1.5 平方差公式(分层练习)-2022-2023学年七年级数学下册同步精品课堂(北师大版)(已下线)专题1.31 整式的乘除(几何图形问题50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)(已下线)专题3.33 整式的乘除(几何图形问题50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(浙教版)(已下线)专题9.42 整式的乘法与几何图形50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(苏科版)
更新时间:2022-12-26 15:22:40
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适中
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名校
【推荐1】如图1是一个长为
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(4)将正方形
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解答题-问答题
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适中
(0.65)
【推荐2】从边长为
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(1)上述操作能验证的等式是___________;(请选择正确的一个)
A.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0b15f6afada3422457c8c2eb0a512295.png)
B.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065ba628ff941de20a0bef5746ea7940.png)
C.![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf41b89854de47c585a9405deb5f198d.png)
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B.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/065ba628ff941de20a0bef5746ea7940.png)
C.
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(2)应用你从(1)选出的等式,完成下面试题:已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e8ad80127bb2c0c86c9ae1e23e8713a7.png)
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