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数位 (数学)

数位(digit's place[1])或(place),指一个中每一个数字所占的位置。

整数部分的数位从右起,每4个数位是一级。“个级”包括个位、十位、百位和千位,表示多少个一;“万级”包括万位、十万位、百万位和千万位,表示多少个万;“亿级”包括亿位、十亿位、百亿位和千亿位,表示多少个亿……。

小数部分的数位从左往右依次为十分位、百分位、千分位……表示多少个十分之一、百分之一、千分之一……。

一个自然数数位的个数叫做位数,例如9这个,它只含一个数位(即只有个位这个位置有数字),所以9就是一位数[2];90000则有个位、十位、百位、千位与万位,总共含五个数位,所以90000就是五位数[3]

整数部分 小数部分
…… 亿级 万级 个级 千分级 ……

……

千亿位

百亿位

十亿位

亿位

千万位

百万位

十万位

万位

千位

百位

十位

个位

小数点

十分位

百分位

千分位

……

1 2 3 4 5 6 7 8 9 0 9 8 . 7 5 4

相关资料

参见

参考

  1. ^ Kate Snow. First Grade Math with Confidence---Instructor Guide. Peace Hill Press. 2021. ISBN 9781952469060. 
  2. ^ 《数学大世界(小学3-4年级版)》2009年第09期 “数位”与“位数”
  3. ^ 数字、数位和位数-数学故事. [2017-11-01]. (原始内容存档于2017-11-07). 

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数位 (数学)
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