Which country invented the abacus?

It was invented by China people on the basis of long-term use of calculation. It was a great and important invention in ancient China. Before Arabic numerals appeared, it was a widely used calculation tool all over the world.

The origin of abacus can be traced back to the late Han Dynasty and three generations, which was invented by Guan Yu. It is said that there was a "computing board" in China at that time. The ancients strung 10 abacus beads into a group, arranged them in groups, put them in boxes, and then quickly set aside the abacus beads for calculation.

In ancient times, people used small sticks to calculate. These sticks are called "computing chips", and calculations with computing chips as tools are called "calculations". Later, with the development of production, the calculation with wooden sticks was limited, so people invented a more advanced calculation tool-abacus.

Extended data

China's abacus evolved from the ancient "calculation". "Calculation" is to use a bamboo stick as a bargaining chip. The multiplication and division method was improved at the end of the Tang Dynasty, and the formula for calculating division was produced in the Song Dynasty.

/kloc-In the middle of the 5th century, Luban Mu Jing had a standard for making abacus. Due to the popularity of abacus, books on abacus came into being. The most popular book of abacus calculation is the Arithmetic Unified Sect compiled by Cheng Dawei in Ming Dynasty on 1593.

Arithmetic Unity is a book based on the application of abacus. The book *** 17 contains 595 application problems, most of which are taken from other calculators, but all calculations are done with abacus. The book contains abacus schema and abacus formula, and gives examples to illustrate how to calculate on abacus according to the formula. Among them, the square root and the square root algorithm were first proposed by Cheng Dawei.

At the end of the book, the appendix "The Origin of Mathematical Classics" records 5 1 mathematical titles since the Song and Yuan Dynasties, most of which have been lost, and this appendix has become a valuable mathematical historical material.

Because the abacus formula is easy to remember and use, it is widely used in China, and also spread to Japan, Korea, India, the United States, Southeast Asia and other countries and regions.

Baidu encyclopedia-abacus