First, writing:

1, numbers should be written in descending order, for example: 1, 2,3 ... 9,10,1.

2. Integers and fractions should be written in a prescribed way, for example, integers should be written in the form of integer part+decimal part, and decimals should be written in the form of "integer part, decimal part".

3. Rational numbers and irrational numbers should be written in the prescribed way. For example, rational numbers should be written in numerator/denominator, and irrational numbers should be represented by root signs or other symbols.

4. Mathematical expressions should be written in accordance with prescribed symbols and formats, such as: plus sign (+), minus sign (-), multiplication sign (*), division sign (/), etc.

Second, read:

1, numbers should be read in descending order, for example: 1, 2, 3, ... 9,10,1.

2. Integers and fractions should be read in a prescribed way, for example, integers should be read in the form of integer part+decimal part, and decimals should be read in the form of integer part and decimal part.

3. Rational numbers and irrational numbers should be read in a prescribed way, for example, rational numbers should be read by numerator/denominator, and irrational numbers should be represented by root signs or other symbols.

4. Mathematical expressions should be read according to the specified symbols and pronunciations, such as: plus sign is read as addition, minus sign is read as subtraction, multiplication sign is read as multiplication, and division sign is read as division.

Reading and writing are two ways to represent numbers:

1, pronounced as Chinese characters for numbers. For example, 123 is pronounced as 123 or 123, and the former is generally used.

2. Writing means using Arabic numerals or Roman numerals to represent numbers, for example: 123, and writing: 123. Among them, the unit digit is 3, the decimal digit is 2 and the hundredth digit is 1.

3. Besides using mathematics to express numbers, reading and writing are also widely used in other fields. For example, in banking, it is easy to calculate by reading to indicate capitalization to prevent it from being altered, and by writing to indicate numbers, sometimes both methods are used together. In scientific research, reading is used to represent experimental data and measurement results, while writing is used to represent scientific formulas and chemical equations.