星座古典占星分数负数

定义

小于0的分数即为负分数

或是可以化成分数的负有限小数和负无限循环小数。

运算　法则：

对于负分数的加减运算,先确定和、差的符号，再转化为正分数的加减运算。

小结：

减去一个数等于加上这个数的相反数。互为相反数的两个数相加为零。

易错点

1.判断一个数是否是负分数时，一定要依据其最原始的形态来判断。

例：－4/2是负分数，因为－4/2虽然约分后等于－2，但是意义是完全不一样的。分数里又有真、假分数。真分数又包括一般真分数和最简真分数。 －4/2是负的一般真分数，它是分数。但不可以说它是整数。

2.因为所有的数都可以写成该数比1的形式，所以一般认为形如负一分之几的数不属于负分数。

3.不等式中有分式时要考虑它的符号。

负分数不是负数?

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