Jiujiu multiplication table is a multiplication formula in mathematics, and its alias is Jiujiu Song, which was produced in the Spring and Autumn Period and the Warring States Period. From Algorithm Success.
Related history:
Multiplication by multiplication table is not the inevitable result of carry system. Babylon had the carry system, but they didn't invent or use the multiplication table in the form of 99 tables, but invented the square table method to calculate the products. The Mayans' mathematics was the most advanced in the ancient civilization in the Western Hemisphere, and they used the decimal system, but they didn't invent the multiplication table. It can be seen that there has been a lot of progress from the carry system to the multiplication table.
China not only invented the decimal system, but also invented the Jiujiu Watch during the Spring and Autumn Period and the Warring States Period. Later, the East was introduced to Korea and Japan, and then spread to India and Persia in the west through the Silk Road, which became popular all over the world. Decimal system and nine tables are important contributions of ancient China to world culture. Nowadays, countries around the world rarely use multiplication in Greece and other countries.