关于小数的知识：1.什么是小数？仿照整数的写法，写在整数个位的右面，用圆点隔开，用来表示十分之几、百分之几、千分之几……的数叫小数。2、什么是小数的基本性质？小数的末尾添上零或者去掉零，小数大小不变，这叫小数的基本性质。3、什么是有限小数？小数部分的位数是有限的小数叫有限小数。

4、什么是无限小数？小数部分的位数是无限的小数叫无限小数。5、什么是循环节？一个循环小数的部分依次不断重复出现的数叫做这个数的循环节。6、什么是纯循环小数？循环节从小数第一位开始的叫纯循环小数。7、什么是混循环小数？循环节不是从小数部分第一位开始的叫做混循环小数。

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