How to write Arabic numerals 1 to 9?

Arabic numerals 1 to 9 are written in the grid near the left of Tian Zige, and 10-20 is used to fill in a Tian Zige;

Each number only takes up one day in the grid, as shown in the following figure:

Extended data:

1, Arabic numeral writing rules

(1) The "0" before the decimal point of pure decimal cannot be omitted. Whether it is narrative or chart, the "0" before the decimal point of pure decimal cannot be omitted, and numbers in the formats of ".27, .39" cannot appear.

(2) Arabic numerals cannot be used together with chinese numerals, except "Wan", "One" and Chinese symbols with the prefix "SI". For example,13 million can be rewritten as13 million, but it cannot be written as13 million.

(3) Numbers with four digits or more should be written by three-digit segmentation method.

2. The use of capital figures began in Ming Dynasty. Zhu Yuanzhang issued a decree because of a major corruption case "Guo Huan case" at that time, which clearly required that the number of bookkeeping should be changed from "one, two, three, four, five, six, seven, eight, nine, ten, ten and one hundred thousand" to "one, two, three, four, five, seven and nine". Later, "Mo" and "Qian" were rewritten as "Bai and Qian", which have been used ever since.

References:

Baidu Encyclopedia _ Arabic numerals