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38x128x8x3的简便计算
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(2)~,发现5x8是40,40x25是1000,然后2x19x3是114
咨询记录 · 回答于2022-04-08
38x128x8x3的简便计算
好哒好哒,亲,请稍等下,我在整理答案哦![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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亲亲~,您可以把128换成(100+28)计算,这样简单哦,具体分析如下:
1、亲~,根据题意可以知道,这是一个乘法计算题![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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2、亲~我们可以把式子化简观察下,原式=38x(4x4x4x2)x8x3x24![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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亲~,这样发现式子太复杂,所以化简找不到规律![](https://s.bdstatic.com/common/openjs/emoticon/img/face_73.png)
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3、,所以我们可以把128拆分成100+28,所以原式=38x(100+28)x3x8
4、亲~,所以原式=38x100x24+38x28x24=116736![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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,在吗,您这个式子是不是错了![](https://s.bdstatic.com/common/openjs/emoticon/img/face_73.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_73.png)
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亲~,是不是38x125x3x8![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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~,如果是38x125x3x8,那么就很简单了,具体分析如下:
(1)亲~,首先我们对式子简单分析,38x3x125x8=38x3x25x5x8![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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(1)亲~,首先我们对式子简单分析,38x3x125x8=2x19x3x25x5x8![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
(2)~,发现5x8是40,40x25是1000,然后2x19x3是114
(3)亲~,最后把他们全部乘起来结果是1000x114=114000![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
~,综上所述答案是114000
亲~,这题不复杂,需要仔细观察,找准题目规律,然后利用乘法交换律计算![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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拓展补充: 乘法分配率:两个数的和与一个数相乘,可以先把它们分别与这个数相乘,再将积相加这叫做乘法分配律。
亲亲~,希望我的回答可以帮助到您哦![](https://s.bdstatic.com/common/openjs/emoticon/img/face_68.png)
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