The teaching content of this section is to solve practical problems according to the meaning and calculation of fractional multiplication. There are two types of fractional multiplication problem solving: one is that the data contains fractions, but the quantitative relationship and solving method are the same as integers, such as questions 2, 9, 7 and 9 in Exercise 3, which belong to this category. The other is the problem of finding the fraction of a number.

(2) Analysis of learning situation

Through the previous study, students have understood the significance and calculation method of fractional multiplication. Finding the quantitative relationship of a number's fraction is special, and the line graph can clearly express the relationship between the quantities. Therefore, in teaching, students can analyze the quantitative relationship through line graphs and choose the best algorithm from many algorithms to solve practical problems.

(3) Target positioning

According to the students' life experience and knowledge background and the knowledge characteristics of this course, I set the following teaching objectives:

1, master the simple ideas and methods to solve the application problems of fractional multiplication;

2. Learn how to observe and draw a line graph to help analyze the quantitative relationship.

3, in the process of learning, cultivate the ability to analyze and solve problems.

Key points: let students learn to solve problems with the knowledge of fractional multiplication, which reflects the diversity of problem-solving strategies.

Difficulties: Accurately judge which quantity is which fraction, that is, who is the unit "1".