1, decimal multiplication: decimal multiplication operation; Application of fractional multiplication; Conversion between fractions and decimals; Optimization of fractional operation.

2. Fractional division: fractional division operation; Application of fractional division: special application of fractional division: optimization of division operation.

3. Percentage: the definition and significance of percentage; Conversion of percentage and fraction; Conversion between percentages and decimals; The application of percentage in life.

4. Proportion and inverse proportion: the concept and essence of proportion: the concept and nature of inverse proportion; Application and reasoning of proportion; Application and reasoning of inverse proportion.

5. Area and volume of graph: area calculation of circle; Volume calculation of cuboids and cubes; Area calculation of triangle and trapezoid.

6. Statistics and probability: the application of data statistics; Calculation and application of probability.

The role of mind mapping

1. Improve the clarity and efficiency of thinking: Mind maps present information in a visual way to help users better understand and organize their own thinking. It can clearly show the relationship between themes and sub-themes, make the thinking process more organized and help to improve the clarity and efficiency of thinking.

2. Promote the depth and breadth of thinking: Mind mapping can guide users to think from multiple angles and in all directions by linking different topics. It encourages users to dig deep into problems, and at the same time, it can help users broaden their thinking fields, thus solving problems better.

3. Improve the ability to innovate and solve problems: As a thinking tool, mind map can help users find problems, analyze problems, solve problems and even innovate. Through the guidance of mind map, users can better understand problems, find effective solutions, and even stimulate new thinking and creativity.

4. Enhance learning and memory effects: Mind maps present information in a visual way to help users remember and understand. It can express complex information in a way that is easy to be accepted and understood, thus enhancing the effect of learning and memory.

5. Teamwork and communication: In teamwork and communication, mind mapping can be used as an effective tool to express and exchange ideas. It can make team members better understand each other's ideas and promote the effect of communication and collaboration.

6. Planning and managing tasks: Mind mapping can help users plan and manage tasks better. It decomposes tasks into different subtasks and organizes them according to certain logical relations, so that users can better arrange time and resources and improve work efficiency.