Teaching reflections on practical problems to find out what fraction of a number is

This part of the content is taught on the basis that students have mastered the meaning and basic properties of fractions, as well as the knowledge of multiplying fractions by integers and multiplying fractions by a number. The main content is to use line segment diagrams to analyze quantitative relationships and solve the problem of finding what fraction of a number is. It focuses on allowing students to understand that "finding what fraction of a number is" should be calculated by multiplication, which is a learning process. The practical application of the meaning of multiplying numbers by fractions is also the basis for learning "what fraction of a number is known to find the number" and solving more complex problems, so that students can master the analytical solution to such problems. is of great significance.

In the teaching process, students are first allowed to experience the process of independent thinking, independently explore strategies and methods to solve problems, improve students' own ability to analyze and solve problems, follow the characteristics of students' cognition, and guide students to experience a The transformation process from practical problems to mathematical problems further develops thinking skills. By comparing and observing the line segment drawings of the two problems, students are guided to understand under what circumstances one line segment drawing is drawn and under what circumstances two line segment drawings are drawn. Learn to use line segment diagrams to analyze the relationship between quantities, and ultimately enable students to understand that "finding what fraction of a number is" should be calculated by multiplication, providing methodological guidance and guidance for later solving fraction division problems and slightly more complex problems. bedding.

Through targeted and scientific classification exercises, it not only consolidates the knowledge learned, but also allows students to master the method of solving problems by drawing line segment diagrams through various exercises, and further understand fractions. The meaning of multiplication can form clear ideas and cultivate students' thinking ability. Judging from the students' learning effects, there are still some students who cannot really master the method of drawing line segment diagrams, and students need to be guided to understand step by step.