增加多少电话用户

• 作 者: 曾健
• 出 处: 小学生导读
• 发表日期: 2015年Z2期
• 关键词: 数一 万户 最高位 列式 八位

妮妮和爸爸聊天,爸爸问妮妮:“你可知道姑姑家的电话号码?”妮妮说:“我记得,姑姑在海口,她的电话号码是0898-65395255。”“对,前边那4个数码是区号,后边的8个数码是电话号码。十多年前,海口市的电话号码也同咱们现在一样,是七位数,后来随着用户增加,改为八位数。”爸爸说,“你算一算,像这样由七位数变成八位数,大约可以增加多少电话用户呢?”

Nini and Dad chat, my father asked Nini: “You know the aunt’s phone number? ” Nini said: “I remember, my aunt in Haikou, her phone number is 0898-65395255. ” “ Right, in front of the four digital is the area code, followed by the eight digital phone number more than ten years ago, Haikou City, the same phone number as we are now, is a seven-digit, and later as the user increases to eight ”Daddy said,“ You figure it out, like this number from seven to eight, about how many phone users can increase it? ”