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一个长方形长30厘米宽20厘米长增加5厘米宽增加4厘米长方形的面积增加了多少厘
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亲亲
,很高兴为您解答哦,一个长方形长30厘米宽20厘米长增加5厘米宽增加4厘米长方形的面积增加了解答如下:原长方形面积为30*20=600平方厘米,增加后的长方形面积为(30+5)*(20+4)=35*24=840平方厘米。增加的面积为840-600=240平方厘米。![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
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咨询记录 · 回答于2023-05-23
一个长方形长30厘米宽20厘米长增加5厘米宽增加4厘米长方形的面积增加了多少厘
有两个题不会
亲亲
,很高兴为您解答哦,一个长方形长30厘米宽20厘米长增加5厘米宽增加4厘米长方形的面积增加了解答如下:原长方形面积为30*20=600平方厘米,增加后的长方形面积为(30+5)*(20+4)=35*24=840平方厘米。增加的面积为840-600=240平方厘米。![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
您有不会的问题发过来就可以哦。![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
5.6
亲亲
5.一个长方形,长3公分,宽12厘米,求长方形的面积是3*12=36平方厘米哦。![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
亲亲
首先求出教室的面积,即6米×4米=24平方米,将24平方米转换成平方分米,则是2400平方分米。每块方砖的面积为3平方分米,因此需要的方砖数量为2400÷3=800块。所以,铺地面最少需要800块方砖。![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_207.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_100.png)
太谢谢你了
那个今天是可以了那要是有不会的