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7×5/28+3×1/28用脱式计算。
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咨询记录 · 回答于2023-02-06
7×5/28+3×1/28用脱式计算。
您好很高兴为您解答
7×5/28+3×1/28=35/28+3/28=38/28=19/14
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下面是扩展哦简便运算是这是小学数学计算题中最常见的一种
。从学生一开始接触计算就从各个不同的角度渗透了简便运算的思想,到了四年级在计算题中简便运算则做为独立的题型正式出现,它是计算题中最为灵活的一种,能使学生思维的灵活性得到充分锻炼,对提高学生的计算能力将起到非常大的作用。 何谓简便运算,这是一个非常简单的问题,但要正确地理解它,决不能为了追求简便的形式而进行简便运算。
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6.3×1/9×2/7
您好很高兴为您解答
6.3×1/9×2/7=0.7×2/7=0.2![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
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40%x-1/4=7/12解方程
X-2/7x=1/14
1-2/5x=15
您好
40%x-1/4=7/12解方程0.4x=10/12x=25/12
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X-2/7x=1/145/7x=1/14x=1/10
1-2/5x=152/5x=-14x=-35![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
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13257+25432+57896+103597+5927+68954+875+956+789+25999
1357+2359+46899+12000。597+25432+59528甲一5533291+59329
13257+25432+57896+103597+5927+68954+875+956+789+25999=303682![](https://s.bdstatic.com/common/openjs/emoticon/img/face_01.png)
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