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本帖最后由 新马甸甸 于 2014-7-8 09:23 编辑
需要翻译些文件,里面有有关rounding of numbers, 数学不好,帮忙解释下好吗?(新增全文)
Rounding off. the following procedure is to be used in rounding off numbers:
1)choose the rounding (up or down) whichever is the nearer. in general this will be evident.
2)if, despite the use off all the figures which can be obtained from the data, the figures to be discarded fall exactly between two alternative prospective round values, and there is no evidence to indicate in which direction to round, choose the even round value. this rule applies to both positive and negative values.
rounding off should be carried out in one operation. if a value, e.g. of 99.253 percent is to be rounded-off to one place of decimals, the figures in the second and third decimal places should be considered together, the rounded-off value being 99.3 percent. if rounding off is carried out in two operations an incorrect figure may be obtained in the last place, e.g. if 99.253 percent is rounded-off in two operations, it first becomes 99.25 percent and then 99.2 percent.
下面是原帖内容
where the figure next beyond the last figure or place to be retained is 5,or a 5 followed only by zeros, the figure in the last place retained shall be:
a)increased by one if it is odd, and
b)left unchanged if even
(0 is regarded as an even number)
比如:0。0505 is rounded off to 0.050
0.15----0.2
10.5---10
99.84---99.8
99.85----99.8
99.851----99.9
99.86---99.9 |
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