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电影网上怪谈国语剧情介绍: There was, however, much variation in detail. The Roman system favours gathering by fives as much as tens, with special symbols,V and L, for five and for fifty respectively. The Ancient Greek system was squarely based on grouping by tens. They would use specific letters to stand for numbers, sometimes dashed to tell the reader that the symbol should be read as a number rather than as a letter in some ordinary word. For example,π stood for 80 and γfor 3, so they might write πγto denote 83. This may look equally as efficient, and indeed much the same as our notation, but it is not. The Greeks still missed the point of the positional system as the value of each of their symbols was fixed. In particular,γπcould still only represent the same number,3+80, whereas ifwe switch the order of the digits in 83 we have the different number 38.
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