Learning objectives:
1, we should feel the idea of set in specific situations and perceive the generation process of set graph.
2. With the help of intuition, I can use the method of set thinking to solve simple practical problems, and at the same time further understand the idea of set in the process of solving problems, and then form strategies.
3. Infiltrate the consciousness of solving overlapping problems in various ways, and cultivate your study habits of being good at observation and diligent in thinking.
Summary of key knowledge:
1, with the help of Wayne diagram, use set thought to solve problems.
2. Number of parts+number of other parts-number of repetitions = actual total.