What are some idioms about numbers?
Echoing each other should kill two birds with one stone and plummet. Exactly the same. One violence and ten cold are thousands of miles a day.
One hundred and fifty-one thoughts, two sides, three knives, three long and two short, three transgressions, five times, three two, three heads, six arms and three thoughts.
In a few words, it is fragmented, extending in all directions, smooth, colorful and changeable.
There are too many colorful chefs with six heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads, seven heads and eight heads.
Extending in all directions, it's a narrow escape, nine Niu Yi hair, ten horses and nine stable, perfect, full of holes, and invincible.
Qian Shan has many troops and many hardships.
It's true, strange, strange, strange, strange.
It is the same. Qianshan is foolproof.
About the history of numbers
Around 500 AD, with the rise and development of economy, culture and Buddhism, Punjab in the northwest of Indian subcontinent has been in a leading position in mathematics, which originated in India. Astronomer Ayepihite made a new breakthrough in simplifying numbers: he recorded the numbers with a grid. If there is a symbol in the first grid, such as a point representing 1, then the same point in the second grid represents ten, and the point in the third grid represents one hundred. In this way, not only the digital symbols themselves, but also their position order is of great significance. Indian scholars also introduced the symbol zero. It can be said that these symbols and representations are the old ancestors of Arabic numerals today.
In 700 AD, Arabs unified under Islam conquered the neighboring nationalities and established the Saracen Empire from India in the east to Spain in Africa in the west. Later, this great Islamic empire split into two countries, East and West. Because the kings of these two countries have rewarded culture and art, the capitals of both countries are very prosperous, with Baghdad in the east, Greek culture in the west and Indian culture in the east gathered here. Arabs understand and digest two cultures, thus creating a unique Arab culture.
About 700 years ago, the Arabs conquered Punjab, and they were surprised to find that the mathematics in the conquered area was more advanced than theirs. In what way can these advanced mathematics be moved to Arabia?
Later, Arabs introduced this figure to Spain. 10 century, by Pope Gelber? Auriac spread to other European countries.
Around 1200, European scholars formally adopted these symbols and systems.
In the13rd century, at the initiative of Fibonacci, a mathematician in Pisa, Italy, ordinary Europeans also began to adopt Arabic numerals, which was quite common in the15th century. At that time, the shape of Arabic numerals was not exactly the same as that of modern Arabic numerals, but just close. Many mathematicians have spent a lot of effort to make them become the writing methods of 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 today.