老师,不太懂为什么这么做:(下面)一筐枇杷,先拿出140个,又拿出余下的40%,这时筐里余下的枇杷正好是原来总数的五分之一.这筐枇杷原来有多少个?1/5÷(1-40%)=1/3 原来=140÷(1-1/3)=210个 为什么
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/02 03:11:50
![老师,不太懂为什么这么做:(下面)一筐枇杷,先拿出140个,又拿出余下的40%,这时筐里余下的枇杷正好是原来总数的五分之一.这筐枇杷原来有多少个?1/5÷(1-40%)=1/3 原来=140÷(1-1/3)=210个 为什么](/uploads/image/z/13886179-43-9.jpg?t=%E8%80%81%E5%B8%88%2C%E4%B8%8D%E5%A4%AA%E6%87%82%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%99%E4%B9%88%E5%81%9A%EF%BC%9A%EF%BC%88%E4%B8%8B%E9%9D%A2%EF%BC%89%E4%B8%80%E7%AD%90%E6%9E%87%E6%9D%B7%2C%E5%85%88%E6%8B%BF%E5%87%BA140%E4%B8%AA%2C%E5%8F%88%E6%8B%BF%E5%87%BA%E4%BD%99%E4%B8%8B%E7%9A%8440%25%2C%E8%BF%99%E6%97%B6%E7%AD%90%E9%87%8C%E4%BD%99%E4%B8%8B%E7%9A%84%E6%9E%87%E6%9D%B7%E6%AD%A3%E5%A5%BD%E6%98%AF%E5%8E%9F%E6%9D%A5%E6%80%BB%E6%95%B0%E7%9A%84%E4%BA%94%E5%88%86%E4%B9%8B%E4%B8%80.%E8%BF%99%E7%AD%90%E6%9E%87%E6%9D%B7%E5%8E%9F%E6%9D%A5%E6%9C%89%E5%A4%9A%E5%B0%91%E4%B8%AA%3F1%2F5%C3%B7%281-40%25%29%3D1%2F3+%E5%8E%9F%E6%9D%A5%3D140%C3%B7%281-1%2F3%29%3D210%E4%B8%AA+%E4%B8%BA%E4%BB%80%E4%B9%88)
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