The correct way to write the number 9 is to draw a curve with a pen from a point above the middle of the vertical center line to the middle of the upper edge line; Then draw a bend to the left, to the middle of the left line; Then draw a bend to the lower right to the middle of the horizontal center line; Draw a bend to the right and return the pen; Then draw a straight line from this point to the lower left, and write it to the middle left of the lower sideline to close the pen.

The number 9 is a number in the Arabic numeral system, which is used to represent numerical values. It usually consists of a downward curve and a vertical straight line. The bending line starts near the upper right corner and bends to the lower left corner to the middle of the lower line. This writing is the most common and widely accepted way.

9 is a natural number between 8 and 10, a positive integer, an odd number and a composite number.

9 is an Arabic numeral, 9 is the square of 3, or it can be said that it is the square of 3. It is a square number, a rational number. 9 is the largest number in a single digit.

Because nine is the largest single digit, it is an imaginary number and a limit number for Yang in China, which often means the most and countless meanings.

The origin of Arabic numerals:

Arabic numerals were first invented by ancient Indians and then introduced to the west through Arabia. Arabic numerals are composed of ten counting symbols: 0, 1, 2, 3, 4, 5, 6, 7, 8, 9***, written from left to right, with high bits on the left and low bits on the right. The formation and spread of Arabic numerals have experienced a long history.

Around 500 AD, Punjab in the northwest of Indian subcontinent has been in the leading position in mathematics. Astronomer Ayepihite has made a new breakthrough in simplifying numbers. He recorded the numbers in a grid, not only the digital symbols themselves, but also their position order is of great significance. These symbols and representations are the ancient ancestors of Arabic numerals.

Arabic numerals were first introduced into the Arab region and evolved into two kinds of numerals used by Arabs: East Arabic numerals and West Arabic numerals. The Arabic numerals in the East are very similar to those used by Arabs today, while the Arabic numerals in the West gradually improved into Arabic numerals widely used today after being introduced into Europe.