1. integer reading method: from high to low, read step by step. When reading the 110 million level, first read according to the reading method of the 100 million level, and then add a word "100 million" or "10 thousand" at the end. The zeros at the end of each stage are not read, and only a few zeros of other digits are read.

2. Writing of integers: from high to low, writing step by step. If there is no unit on any number, write 0 on that number.

3. Decimal reading method: When reading decimals, the integer part is read by integer reading method, the decimal point is read as "dot", and the decimal part reads the numbers on each digit from left to right in sequence.

4. Decimal writing: When writing decimals, the integer part is written as an integer, the decimal point is written in the lower right corner of each digit, and the decimal part is written on each digit in turn.

5. How to read fractions: When reading fractions, read the denominator first, then the "fraction" and then the numerator. The numerator and denominator are read according to the reading method of integers.

6. How to write the fraction: write the fraction first, then the denominator, and finally the numerator and the integer.

7. Reading the percentage: When reading the percentage, read the percentage first, then read the number before the percent sign, and read it by integer reading.

8. Writing of percentage: percentage is usually expressed by adding a percent sign "%"after the original molecule instead of a fraction.