When did the abacus originate?

1), the mystery of the origin of abacus. However, when did China start to have an abacus? As for the Ming Dynasty, Luban Mu Jing, compiled during Yongle period, had specifications and dimensions for making abacus, and there were also some books introducing the usage of abacus, such as Zhu Zhu Algorithm by Xu Xinlu and Tong Zong by Cheng Dawei, so abacus was widely used in the Ming Dynasty, which is beyond doubt. The basis is as follows: First, in the famous painting The Riverside Scene at Qingming Festival in Song Dynasty, there was a drugstore with an abacus on the counter. After enlarging the picture, the abacus experts in China and Japan confirmed that the object in the painting is a renju abacus similar to the abacus used in modern times.

2) The history of abacus The history of abacus. First of all, J.Napier, a world-famous British mathematician, first created the concept of logarithm and introduced a new numerical operation tool in his book, which was later called "Napier slide rule". However, Napier's greatest contribution in the field of mathematics is his concept of logarithm published in 16 14. The concept of logarithm initiated by him has influenced a generation of mathematicians and greatly promoted the development of mathematics. The basic principle of slide rule is the application of logarithmic principle, so Napier's invention laid the foundation for the development of slide rule in the future. 3) Xu Yue, a mathematician at the end of the Eastern Han Dynasty, was the inventor of the abacus. Laizhou abacus is a calculation tool that everyone is familiar with. Who was the inventor of the abacus? What is the exact year of invention? We first saw the word "abacus" in Xu Yue's book Numerology Legacy in the Eastern Han Dynasty. However, the note says that only addition and subtraction can be done. Today, it seems that this theory is the embryonic form of an abacus. From the analysis of available reliable data, abacus was invented in Song and Yuan Dynasties. Cheng Dawei's "Directing at Arithmetic, Unifying Clan" (1592) in Ming Dynasty is the most widely circulated and influential book on abacus calculation. The abacus is one of China's great scientific achievements in ancient times. It has the advantages of simple structure, simple operation and convenient carrying, so it is widely used and lasts for a long time. Until today, abacus calculation is still a compulsory course for primary school students in China. Although all kinds of electronic computers and calculators are quite popular in the market, their operation speed can't keep up with the abacus in the hands of skilled abacus operators when adding and subtracting.

After China showed his talents, abacus crossed the ocean and spread to Korea, Japan, Southeast Asia and Arabia, making important contributions to world civilization.