2. When reading, read from the high position, read the 0 in the middle of the number, and don't read the 0 at the end of the number. When writing numbers, write them down from a high place. If there is no unit on any number, write 0 on that number.
3, such as: 30500644500
Reading: 3050604500
Such as: 4326798
Writing: 43206798