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小学数学：使用借1法简便快速比较下列分数
小学数学：分数比较的技巧方法二：借1比较法 分数比较的几种技巧方法：借1比较法。当两个分数都比1小且与1比较接近时，我们可以先分别求出1与它们的差值，差值较小的，分数就大，反之，差值大时，分数就小。 比较 21/23 和 31/34 的大小 1- 21/23 = 2/23 = 6/69 1- 31/34 = 3/34 = 6/68 因为 6/69 < 6/68 ，所以 21/23 > 31/34
小升初数学总复习178/299
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