Introduction to Five Classics Arithmetic: Notes on Mathematical Knowledge and Calculation Methods.

Arithmetic in Five Classics is the ninth ancient book when Ten Books of Arithmetic Classics were published, and it was also written by Zhen Luan. > The Five Classics Arithmetic is a commentary on the mathematical knowledge and calculation methods in Shangshu, Shijing, Zhouyi, Li Ji, Analects of Confucius and Zuozhuan. For example, in Shangshu, the phrase "leap month is from four o'clock to four years old" is explained by the method of "quarter calendar". Cut the Book of Songs Tan: "Take 30 billion grains from Hu", and "Trillion and Harmony" in the bumper year, with trillions of notes. He criticized the ancient annotations of Mao and Zheng Xuan, and put forward his own carry method for these large numbers. "The Analects of Confucius Cher" said: "A country with a thousand times of Taoism", in which the area of a country with a thousand times of Taoism is 654.38+ million square miles. By using the open method, we know that 06 is a square with a side length of 365438+68 steps. The Pythagorean theorem is used to explain the car cover method in Zhou Guan Kao Gong Ji. The mourning method in "Yili" is explained by equal proportion sequence. The record of calendar in Zuo Zhuan is explained by the Zhou calendar in six kinds of seasonal calendars. All the annotations have no new contribution to mathematics, and they are all ancient annotations about scriptures.