How do beginners use abacus?

Fingering: lower bead beam of thumb, upper bead beam of middle thumb, upper bead beam of middle thumb and lower bead beam of second thumb.

Introduction:

Abacus, also known as abacus and abacus, is a simple calculation tool invented by our ancestors. The abacus calculation originated in the Northern Song Dynasty, and it was not counted until the Northern Song Dynasty. Abacus is a simple calculation tool invented and created by the working people in ancient China. China is the hometown of abacus. Today, computers have been widely used. The ancient abacus has not been abandoned, but it is in the ascendant in many countries because of its convenience and accuracy. Therefore, people often compare the invention of abacus with four great inventions of ancient china. There is an abacus in Zhao Taicheng's medicine cabinet in the famous painting "The Riverside Scene at Qingming Festival" in the Northern Song Dynasty. Because of its convenient and quick operation, abacus has been widely used by working people in ancient China for thousands of years. Even the most advanced modern electronic calculator can't completely replace the abacus. UNESCO has just passed in Baku, the capital of Azerbaijan, and abacus has officially become the intangible cultural heritage of mankind. This is also the 30th non-legacy project in China.

Origin:

The abacus is a traditional calculation tool in China. It was invented by China people on the basis of long-term use of counting chips. It is an important invention in ancient China. Before Arabic numerals appeared, it was a widely used abacus calculation tool in the world.

The origin of abacus can be traced back to 600 BC. It is said that there was a "calculation 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 small sticks was limited, so people invented a more advanced calculation tool-abacus.

By the Ming Dynasty, abacus could not only add, subtract, multiply and divide, but also calculate the land area and the size of things of various shapes.

Dissemination:

Because the abacus is simple to make, cheap, easy to remember and calculate, it is widely used in China and spread to Japan, North Korea, the United States and Southeast Asia. The abacus has now entered the era of electronic computers, but the ancient abacus still plays a certain role. In China, there are a group of abacus experts in all walks of life. The use of abacus is not only convenient to operate, but also has the function of exercising thinking ability, because abacus needs the close cooperation of brain, eyes and hands, and it is a good way to exercise the brain.