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345约等于多少保留整数
更新时间: 2020-07-07 00:00:00  

3、45保留整数,则约等于3,

在取小数近似数的时候,如果尾数的最高位数字是4或者比4小,就把尾数去掉。如果尾数的最高位数是5或者比5大,就把尾数舍去并且在它的前一位进"1",这种取近似数的方法叫做四舍五入法。

关键词: 等于 多少 保留 整数

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