In the past, China used the decimal reading method and adopted the four-digit grading rule, that is, starting from one digit, every four counting units were regarded as the first level. Units, ten, hundred and thousand are called grades; Ten thousand, one hundred thousand, one million and ten million are called ten thousand levels; Billions, billions, billions, billions is called billions.

Reading rules

1 and numbers within four digits can be read from the most significant bit in sequence. For example, 1987 can be read as 1987.

2. For numbers with more than four digits, first grade them by four digits from right to left, and then read out the numbers in each level and their horizontal names in turn from the advanced level.

No matter how many zeros there are at the end of a number, you can't read them. After classification, there is a zero at the end of any level, otherwise it will not be seen. When you need to read them, you can only read one zero, no matter how many zeros are in the middle or how many zeros are in succession, when you need to read them, you can only read one zero.

Extended data i. Classification by reading method

1. Read numbers from left to right according to their rows. For example, 3045002 is pronounced as 3045002. This reading method is used when reading pure decimals or records. It is called simple reading method and can be used to read decimal numbers and non-decimal numbers.

2. According to the number of rows from right to left, taking four digits as a level or three digits as a section, and then reading from left to right, it is called graded reading method or segmented reading method, collectively referred to as complex reading method, which is generally used to read decimal integers.

Second, the law of writing numbers

1. Write in numerical order from the top.

2. Write several thousands, several hundreds, several tens and several places.

If there is no one in the middle or at the end, write 0 on that bit.

Baidu Encyclopedia-Reading Method