abacus(算盘）的发明过程

关于算盘的来历，最早可以追溯到公元前600年，据说我国当时就有了"算板"。古人把10个算珠串成一组，一组组排列好，放入框内，然后迅速拨动算珠进行计算。东汉末年，徐岳在《数术记遗》中记载，他的老师刘洪访问隐士天目先生时，天目先生解释了14种计算方法，其中一种就是珠算，采用的计算工具很接近现代的算盘。这种算盘每位有5颗可动的算珠，上面1颗相当于5，下面4颗每颗当作1。

As to the origins of Abacus, it can date back to 600 BC。 China was said to have a "balance sheet." The ancients considered the 10 bead into a group, one set arranged well into the box, and then quickly toggle count beads calculated. Eastern Han Dynasty, Xu Yue in the "surgery in mind a few left," recorded in his visit to a hermit days head teacher, Mr. Liu, the days, Mr. Head explained the 14 kinds of calculations, one of which is the abacus, using the computational tools is very close to modern calculations . This abacus has 5 each movable operator beads, an equivalent of 5 above, the following four stars as one of each.