中国人很早就开始使用负数.在古代商业活动中,以收入为正,支出为负;以盈余为正,亏欠为负,在古代农业活动中,以增产为正,减产为负.著名的中国古代数学著作《九章算术》的“方程”一章,在世界数学史上首次正式引入负数及其加减法运算法则.书中涉及用不同颜色的算筹(小棍形状的记数工具)分别表示正数 The Chinese have long been using negative numbers. In ancient commercial activities, the revenue was positive and the expenditure was negative; the surplus was positive and the deficit was negative; in ancient agricultural activities, the increase was positive and the output was negative. For the first time in the history of mathematics in the world, the chapter “Equation ” of the nine chapters of mathematics, the ancient Chinese mathematical book, formally introduces the law of negative numbers and its addition and subtraction algorithms, which involve the calculation of the numbers of sticks Tools) represent positive numbers respectively