First of all, talk about textbooks.
The lesson "What is the fraction of a column number" is arranged in Example 8 of this unit of fractional multiplication, which belongs to the problem-solving category. This paper mainly analyzes the quantitative relationship in a fraction of a column number, which can solve a practical problem that a number is a fraction of a column number. This lesson is based on the fact that students have learned how to get the score of a number and how to get the score of a number, and it also lays the foundation for further learning the slightly complicated problem of how to get the score of a number.