1. Determine the central theme: Determine the theme of Unit 5, namely "decimal multiplication". Take the theme as the center of the mind map and write it in the center of a blank piece of paper. Branch theme: As the secondary theme of mind map, it is developed from four aspects: the definition of decimal multiplication, the difference between decimal multiplication and integer multiplication, the operation rules of decimal multiplication and the practical application of decimal multiplication.

2. Add details: Add relevant details and knowledge points under each branch topic. For example, under the definition of decimal multiplication, you can add the definition of "decimal multiplication is the multiplication of two decimals to get a product"; Under "Difference between decimal multiplication and integer multiplication", you can add differences such as "Pay attention to the position of decimal point in decimal multiplication".

3. Use graphics and colors: In order to make mind maps more vivid and interesting, you can use various graphics and colors to highlight key points and classify them. For example, different colors can be used to represent different branch topics, or boxes of various shapes can be used to represent different knowledge points.

Characteristics of fifth-grade mathematics

1, knowledge point increase: Compared with junior high school mathematics, fifth grade mathematics involves more knowledge points, including decimals, fractions, figures and so on. The knowledge points that students need to master also increase accordingly. This requires students to have a more solid mathematical foundation and higher learning ability.

2. Improvement of abstract thinking ability: Grade five mathematics requires students to have higher abstract thinking ability, which requires students to have the ability of induction, reasoning and deduction. At the same time, students need to be able to turn practical problems into mathematical problems and use what they have learned to solve practical problems.

3. Pay attention to calculation ability and problem-solving skills: The fifth grade mathematics pays attention to students' calculation ability and problem-solving skills, and requires students to master a variety of problem-solving methods, such as factorization, general score, and reduction score. At the same time, students need to be able to use what they have learned to solve practical problems, such as travel problems and engineering problems.

4. Close ties with other disciplines: fifth-grade mathematics is closely linked with other disciplines, especially with natural science, social science and other disciplines. For example, knowledge points such as probability and statistics in mathematics are closely related to investigation and research in social sciences.