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- 【征集】西西河的经济学，及清流措施，需要主动参与者，『稷下学宫』新认证方式，24年网站打算和努力目标
主题：算盘是谁发明的 -- yaquan
共:💬14 🌺42 新:
复 你去看wiki
更恐怖的是有了连续进位的概念。太雷人了。当然，有争议的也许是也许是古巴比伦人。注意， 维基承认这些都是“也许”“ may have used xxxx"
The period 2700–2300 BC saw the first appearance of the Sumerian abacus, a table of successive columns which delimited the successive orders of magnitude of their sexagesimal number system.[6]
Some scholars point to a character from the Babylonian cuneiform which may have been derived from a representation of the abacus.[7] It is the belief of Carruccio (and other Old Babylonian scholars) that Old Babylonians "may have used the abacus for the operations of addition and subtraction; however, this primitive device proved difficult to use for more complex calculations".[8]
- 相关回复 上下关系7
🙂这篇文章在它的官网没有找到 yaquan 字249 2010-08-24 23:10:53
🙂韩国搞历史的是个啥意见？ 2 大地窝铺 字0 2010-08-24 20:53:48
🙂你去看wiki 闲看蚂蚁上树 字207 2010-08-24 20:51:50
🙂谢宝，那就给他们发信，纠正他们的问题。 2 当生 字31 2010-08-22 17:08:25
