excel中round函数与rounddown函数区别?

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excel中round函数与rounddown函数区别?excel中round函数与rounddown函数区别?excel中round函数与rounddown函数区别?round四舍五入roundup

excel中round函数与rounddown函数区别?
excel中round函数与rounddown函数区别?

excel中round函数与rounddown函数区别?
round 四舍五入
roundup 全入
rounddown 全舍
round(3.125,2)=3.13
roundup(3.121,2)=3.13
rounddown(3.129,2)=3.12