China did not lead the world in ancient mathematics for hundreds of years, nor did we establish a mathematical system. Most of the middle school mathematics and college mathematics in our classroom are attributed to westerners. During the Westernization Movement, many mathematical terms were translated into Chinese. Oxford University was founded in 1 1 century (Northern Song Dynasty), and the Department of Mathematics of Oxford University was founded in13rd century (Southern Song Dynasty). It can be said that westerners are extremely interested in natural science. This interest far exceeds that of ancient China.

The author of Nine Chapters Arithmetic is no longer here. It is generally believed that it has gradually become the final version after several generations of supplement and modification. Zhang Cang and Geng Shouchang in the Western Han Dynasty had been supplemented and sorted out, and they were generally finalized at that time. The last book was in the early years of the Eastern Han Dynasty at the latest, and most of them were Notes to Nine Chapters written by Wei Yuan, Jing Yuan and Liu Hui in the Three Kingdoms Period (263).

Nine Chapters Arithmetic is the earliest book in the world that systematically describes fractional operation. Among them, the residual algorithm is an amazing creation; The chapter "Equation" also expounds the negative number and its addition and subtraction algorithm for the first time in the history of world mathematics. In algebra, Nine Chapters Arithmetic put forward the concept of negative number and the law of addition and subtraction of positive and negative numbers for the first time in the history of world mathematics. The solution of linear equations taught in middle school is basically the same as that introduced in Chapter 9 Arithmetic. Paying attention to practical application is a remarkable feature of nine chapters arithmetic. Some knowledge of the book has also spread to India and Arabia, and even to Europe through these areas.

There are many mathematical problems in Nine Chapters of Arithmetic, which is the earliest record in the world. For example, the algorithm of proportion is the same as that of16th century in western Europe. The double method problem was once called the Khitan algorithm in Arabia, and it was also called in European mathematical works after13rd century, which is also an evidence that China's ancient mathematical knowledge spread to the west.

But, but, comrades!

Later, it disappeared. Zhang Cang mathematicians can also be prime ministers!

Later, hundreds of people were deported.

Who is still studying math? ...

Just learn a little and settle accounts for a while!