(1)根据图形(1)的面积写出一个公式:___________
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/807858fb-7d8a-48c7-926c-db97ea6f6a2c.png?resizew=424)
图二是两块试验田,“丰收1号”小麦的试验田是边长a米、b米两个正方形,“丰收2号”小麦的试验田是边长为a米、
米的长方形,(
)两块试验田的小麦都收获了
.
(2)哪种小麦的单位面积产量高?(请说明理由)
(3)高的单位面积产量是低的单位面积产量的多少倍?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/14/807858fb-7d8a-48c7-926c-db97ea6f6a2c.png?resizew=424)
图二是两块试验田,“丰收1号”小麦的试验田是边长a米、b米两个正方形,“丰收2号”小麦的试验田是边长为a米、
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/18436f0e2391b0ab7537a566fc28204c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2958030ec9d7543dda1f529593a915e2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2310ea691d441205924ca52895ef844e.png)
(2)哪种小麦的单位面积产量高?(请说明理由)
(3)高的单位面积产量是低的单位面积产量的多少倍?
22-23八年级上·河北承德·期末 查看更多[6]
河北省承德市平泉市2022-2023学年八年级上学期期末考试数学试题(已下线)10.4.1 分式的乘除(练习)-2022-2023学年八年级数学下册同步精品课堂(苏科版)(已下线)专题5.2 分式的乘除法-【帮课堂】2022-2023学年八年级数学下册同步精品讲义(北师大版)(已下线)5.2 分式的乘除法(分层练习)-2022-2023学年八年级数学下册同步精品课堂(北师大版)(已下线)5.2 分式的乘除法-2022-2023学年八年级数学下册《考点·题型·技巧》精讲与精练高分突破系列(北师大版)河北省承德市平泉市回民中学2023-2024学年八年级上学期第三次月考数学试题
更新时间:2023-02-12 13:49:41
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相似题推荐
解答题-计算题
|
适中
(0.65)
【推荐1】一个图形通过两种不同的方法计算它的面积,可以得到一个数学等式,例如图1可以得到
,请解答下列问题:
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101804358778880/3105077565210624/STEM/720e2de03e06499fbc5a56a58e34b599.png?resizew=550)
(1)通过计算图2中阴影部分的面积可以得到的数学等式是 ;
(2)利用图3解决下面问题,若
,
,则
.
(3)如图4,四边形
,
,
是正方形,四边形
和
是长方形,其中
的面积是
,
,
,求图中阴影部分的面积.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/02d351a97edcc0783d8d7a02d041bdb5.png)
![](https://img.xkw.com/dksih/QBM/2022/11/3/3101804358778880/3105077565210624/STEM/720e2de03e06499fbc5a56a58e34b599.png?resizew=550)
(1)通过计算图2中阴影部分的面积可以得到的数学等式是 ;
(2)利用图3解决下面问题,若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf930b59b5ed20def269f884c1101216.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7125629469c897651c1394591a12f22b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828b1fc172f580952bca5eb3908677c0.png)
(3)如图4,四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060b114e21d0f6ff11b9391f9a77f3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd5e1e479972f2b5ec84cf00e85a9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e00092604241a46e42342a8cb326c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f515246d9ee093bfbf9983fd47357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f515246d9ee093bfbf9983fd47357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/90dd550e1ad9bbf01687ffb4aab788ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5d30cd3e53a9df24fe6da5e8a3a7ec5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a9b26213c4bd443406227ee01d5f4c0.png)
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解答题-作图题
|
适中
(0.65)
【推荐2】阅读:若
满足
,求
的值.
解:设
,则
____________,
____________.
所以:
____________
请仿照上例解决下面的问题:
(1)补全题目中横线处;
(2)已知
,求
的值;
(3)若
满足
,求
的值;
(4)如图,正方形
的边长为
,长方形
的面积是400,四边形
和
都是正方形,
是长方形,求图中阴影部分的面积(结果必须是一个具体数值).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f973af79fb2bb962f71a7cc14288287d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f959467c3be51f6316491304a0890acd.png)
解:设
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7c19b2fa1c34fb817cc1d5fd4c673b52.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e521af21600d53d99455798597c9a462.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8247a5865a4b87581cee626edffc4f40.png)
所以:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bdd99ab2d39a02a88eeff27c3b92578.png)
请仿照上例解决下面的问题:
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/21/64610fff-b212-45d8-9a3f-54bc5fedef12.png?resizew=198)
(1)补全题目中横线处;
(2)已知
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/53d8dcb085e0c5cedd1a090bc78d8557.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a5243e85aa726ebf2c43e76e9966727a.png)
(3)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/81dea63b8ce3e51adf66cf7b9982a248.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9276a1c7426a6faec074b72815be7761.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4dde778dd87d628fa30b7edbd03447f6.png)
(4)如图,正方形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0847d4182342de5d59877539e6a92104.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/24f515246d9ee093bfbf9983fd47357d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/060b114e21d0f6ff11b9391f9a77f3cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd5e1e479972f2b5ec84cf00e85a9b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/013e00092604241a46e42342a8cb326c.png)
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