Find the upper left grid of Tian Zige, start from the middle of the left line, draw a curve upward, draw a curve to the right in the middle of the upper edge line, and then tilt to the left in the middle of the vertical center line until you turn at the vertex of the lower left corner. Then draw a horizontal line to the right along the bottom line and write it on the vertical center line to close the pen. At the vertex of the lower left corner, draw a horizontal line to the right along the lower edge, write at the vertical center line and close the pen. You can write in Chinese characters.

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. Later, Arabs introduced this figure to Spain. In 10 century, it was spread to other European countries by Pope Gelber Auriac.

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 began to adopt Arabic numerals.

This phenomenon 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 close to it. In order to make it become the writing style of 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 today.

Many mathematicians have spent a lot of effort. Arabic numerals originated in India, but spread to all directions through Arabs, which is why they were later called Arabic numerals.

The use of numbers

1. Explaining a problem with specific numbers can make the explanation more accurate, scientific, specific and convincing, and express the accuracy of the language with specific numbers, which is more convincing.

2. Some things are often explained by some numbers in order to describe their features quantitatively.