What did China people use to calculate two thousand years ago?

What did China people use to calculate two thousand years ago? Use calculation and abacus to calculate.

Ancient computing tools in China included ropes, chips and abacus. Rope is the most primitive tool, that is, it is tied with rope, and a knot stands for 1, which was used in the tribal period. Calculation and compilation began to appear in the Spring and Autumn Period, and it was used for a long time, and it was still used in the Sui and Tang Dynasties. Zu Chongzhi in the Southern and Northern Dynasties calculated pi by calculation. So more than 2000 years ago, probably from the pre-Qin to the Qin and Han dynasties, the calculation tool used was of course calculation.

In ancient China, chips were used as counting tools to list formulas and calculate various numbers and formulas. Financing, also known as strategy, strategy and calculation, was later called operator. At first, it was a natural object such as a small bamboo stick, and later it gradually developed into a special computing tool, and its texture and production became more and more exquisite.

The calculation is also decimal, and the expression is as follows: one vertical, ten horizontal, hundreds vertical, thousands horizontal, and so on.

The abacus evolved from China people's long-term use of calculation funds, with a history of more than 2,600 years. In ancient times, people used a small stick to calculate. This kind of stick is called "calculation", and the person who uses it as a tool is called "calculation".

There is a record about calculating the shape and size in Hanshu: "The algorithm uses bamboo, with a diameter of one minute and a length of six inches, and 271 pieces are made into six pieces, which is a grip." The chips in the Western Han Dynasty were generally round bamboo sticks with a diameter of 0.23 cm and a length of about 13.86 cm, and 27/kloc-0 chips were tied into hexagonal bundles. Sui Shu Li Zhi said, "It is made of bamboo, two points wide and three inches long. To be honest, it is a good strategy to accumulate 2 16 blocks into 6 blocks.