你可以写standard rounding/symmetric rounding。Rounding的意思是除整，通常有三个 ... ：standard rounding (=1-4 round down
5-9 round up)，rounding up always(=1-9 round up)，rounding down always (=1-9 round down)。这个standard rounding ... 其实是「不公平」，因为1-4只有四个数目字，而5-9郤有五个，所以向上入的机会较多。 一些软件会用都的是unbiased rounding，1-4与6-9的 ... 跟以上的一样，不过5就要看前一个数目字是单还是双数（单向上入，双向下舍）。如果你要两个小数位： 1.041 >1.04 --- 1.051 >1.05 1.044 >1.04 --- 1.054 >1.05 1.045 >1.04 --- 1.055 >1.06 1.046 >1.05 --- 1.056 >1.06 1.049 >1.05 --- 1.059 >1.06 这样，有一半的5会向下舍（02468），而另一半（13579）则向上入。
to round up or down / to round off
Round off the last number
forward as 1 if it is 5 or more
make it as zero if it is 4 or less. (调整最后的数字
若是 5 或大于5
就进位加一
若是4 或低于4
变为零。) forward===进位 以上是符合四舍五入的说法 But
we can say : round something up/down
i.e. increase/decrease (a figure
price
etc) to the nearest whole number. e.g. A charge of $1.90 will be rounded up to $2
and one of $3.10 rounded down to $3. (把$1.90的费用上调为$2
把$3.10下调为$3 ) 2008-06-22 22:12:51 补充： tintin852's advice is helpful. I have got to know that standard rounding represents 四舍五入. But
we need to add some more explanation in case people might not understand.
Rounding off=四舍五入 In this method
we estimate a number correct to a degree of accuracy. Eg:132=130(because 2 little than 5) 1.38=1.4(because 8is greater thanor equal to5) rounding up and down=上舍入和下舍入 而不是四舍五入
参考: my maths book
round down and round up! 例如: can you agree rounding down and rounding up the price of the goods? 你是否可以接受将货物的价格四舍五入?
Four sheds five enter
