1 has different meanings.
Mathematics reading is to capitalize numbers in the process of writing, such as capitalizing one, two and three. For example: 12, pronunciation: twelve. Mathematical writing is to use lowercase Arabic numerals in the process of writing, such as lowercase 1, 2, 3 and so on. For example: 12. Writing: 12.
2. Different writing styles.
Mathematics reading is written as "capital figures"; Math writing is "lowercase numbers (Arabic numerals)".
The reading method is as follows:
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. From right to left are: unit level (including unit, 10, 100, 1000), million level (including 10, 100, 100 million, 100 million) and billion level (including 1 billion, 1 billion, 1 billion).
Reading from high to low, reading step by step, the zero at the end of each stage is not read, and the rest of the digits only read one zero for several consecutive zeros; How to write integers: write from high to low step by step. If there is no unit on any number, write 0 on that number.