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7.2与2.2的差除72和22的比是多少
更新时间: 2021-03-09 05:08:40  

1、可以由题目列出:(7.2-2.2)/72/22=5/1584。

2、等差除等比和等差乘等比一样,都是先乘公比后错位相减化成等比数列。

3、解决差倍问题的基本方法:差÷(倍数-1)=小数(1倍数)小数×倍数=大数或者小数+差=大数;对于差倍问题,我们要利用上面的关系,以及两数之差,通过画线段图来分析解答。

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