Introduction to mathematics:
Ten digits of the Indo-Arabic numeral system, arranged in numerical order. Numbers are written symbols used to represent numbers. Different counting systems can use the same number, for example, the numbers "0" and "1" are used in both decimal and binary. The same number has different representations in different counting systems. For example, the number 37 (Arabic numeral decimal) can be written in many ways: chinese numerals writes 37 Roman numerals, and XXXVII Arabic numerals are written in binary 100 10 1. Numbers are closely related to our lives. It not only has counting function, but also has rich philosophical connotation.
Text representing numbers. There are two kinds of numbers in Chinese characters, lowercase "one two three four five six seven eight nine Ten" and uppercase "1234567890".