How to write an arithmetic video for the class group?

It reads as follows:

1, hello everyone! I want to share an interesting arithmetic video with you today. This video vividly explains the basic rules of addition, subtraction, multiplication and division.

2. Students, today I want to recommend a particularly practical arithmetic video to you. This video explains the skills of fractional operation and decimal operation in detail, hoping to help your study.

3. Hello, classmates! Today, I will bring you a wonderful arithmetic video to teach you how to solve complex math problems in an easy-to-understand way. I hope it helps you.

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