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99.9是几位数
更新时间: 2020-10-03 00:00:00  

解析:小数位数是以小数点右边的数位多少来定的,99、9小数点右边有2位数,所以99、9是2位数。

数学位数简介:一个自然数数位的个数,叫做位数。含有一个数位的数是一位数,含有两个数位的数是两位数。最大的一位数是9,最小的一位数是1,最大的两位数是99,最小的两位数是10。

关键词: 位数

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