Rational numbers are a segment of the real numbers, which can be written in p/q form where p and q are an integer and q (the denominator) is not equal to zero.
【 在 happyyuans 的大作中提到: 】
: 孩子说有理数包括整数和分数。
: 老师让看课本。我看了下课本，写着：能写成分数形式的是有理数。
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