Mathematics stipulates that if the number of minutes is less than 10, add 0 before the number of minutes.

Analysis: in learning, when reading, you should write what you read into Chinese characters, that is, capitalized numbers. Writing numbers is the content of writing, which is defined as Arabic lowercase numbers.

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It means that when writing numbers, the numbers are arranged side by side in a line, and one number occupies a position. These positions are called numbers. From the right end, the first place is the unit, the second place is the tenth place, the third place is the hundred places, the fourth place is the thousand places, and the fifth place is the ten thousand places. This shows that the concept of counting unit and number is different.