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山于生活和生产的直接需要,人类很早就产生了数的概念。为确定历法,就需要对年月进行计算,生活资料和生产资料的分配等也离不开数的计算。自公元前三千年代起,古埃及人就已使用以10为基数的计算法;大约公元前2500年前,苏美尔人就制订了乘法表;中国商代的甲骨文中已有十进位制,春秋战国时期出现了分数概念和九九表并能进行四则
The direct conception of life and production in mountains has long led to the concept of number. To determine the calendar, it is necessary to calculate the year and the month, and the distribution of means of subsistence and means of production can not be separated from the calculation of the number. Since the third millennium BC, the ancient Egyptians had used the method of radix-10; about 2,500 BC, the Sumerians worked out a multiplication table; the Chinese Shang dynasty had a decade-long system of decimal places, Spring and Autumn and Warring States period appeared in the concept of scores and nine nine tables and can be carried out four