Find out how many percent more (or less) one number is than another number 1. On the basis of understanding that one number is a few percent of another number, learn to find the application problem that one number is more (or less) than another number through migration. 2. Cultivate students' migration ability and the ability to analyze and solve application problems. Teaching emphasis: Understand the quantitative relationship between finding a few percent more (or less) than another application problem. Teaching difficulty: master the analysis and solution of this kind of application problems. Teaching process: 1. Oral arithmetic training before class II. Ask questions by yourself (1), 1. Tell who is the unit of the following question "1" and who is the comparison. What percentage of students with three good grades account for the whole class? What is the area of Taiwan Province Island? What is the percentage of cement output that has been produced that is equivalent to the planned output? 2. Originally planned afforestation 12 hectares, actual afforestation 14 hectares. According to the information, what percentage of application questions can you ask? Students report and communicate after thinking. The teacher reports on the blackboard according to the students: 1. What percentage of actual afforestation accounts for the original planned afforestation? 2. What percentage of actual afforestation is the original planned afforestation? 3. What percentage has the actual afforestation increased compared with the original planned afforestation? 4. What percentage is the original planned afforestation less than the actual afforestation? (1), what is the key to solve this kind of application problem? (2) For questions 1 and 2, students can answer independently in the exercise book, and then report the corrections collectively. 2. Teacher: Today, we will continue to learn such more complicated application problems. "What percentage is one number more (or less) than another?" (Writing on the blackboard) 3. Teacher: What knowledge do you want to know, or what knowledge do you already know?