1, prepare a blank sheet of paper and a marker.

2. Write "Understanding of Large Numbers in Unit 1 of Grade Four Mathematics" in the center of the paper and decorate it with colored pens to make the title eye-catching.

3. List the theme and main contents of Unit 1. For example, the theme of the first unit is "Understanding of large numbers", which mainly includes four modules: understanding of numbers within 100 million, decimal counting, understanding of numbers above 100 million and understanding of calculation tools.

4. Under each theme of the mind map, list the knowledge points contained in the theme. For example, "understanding numbers within 100 million" can include knowledge points such as "numbers, counting units and levels"; "Decimal counting method" can include knowledge points such as "forward speed and number correspondence".

5. Under each knowledge point, list the key points and difficulties of the knowledge point. For example, "number correspondence" can include key points and difficulties, such as "the numbers in one digit, ten digits, hundreds digits and thousands digits represent different values".

6. Under the key and difficult points, list the typical examples and analysis of this knowledge point. For example, "the numbers in the digits of unit, tenth, hundreds and thousands are different" may include "1000 =1×103, what are the numbers in thousands?" Examples and analysis.

7. Finally, all the knowledge points and examples are analyzed and summarized in series to form a complete knowledge framework.

Knowledge expansion:

Mind mapping is a graphical tool for organizing and expressing ideas. It presents the thinking process in the brain in a graphical way, which helps us to better understand and remember knowledge, and also helps to stimulate innovation and inspiration. The following is an introduction to mind mapping.

First of all, mind maps usually start from a central theme or problem, and then spread from the central theme or problem to different branches or sub-themes. These branches or sub-topics can reflect different aspects, levels or angles of the theme or problem.

For example, if we are preparing a business speech, our mind map may include the central theme "business speech", and then the sub-themes "purpose", "audience", "content" and "language" spread out from the central theme.

These graphics can help us to better express and organize our thoughts, especially when dealing with more complex problems and systems.

Finally, mind mapping can help us organize and express our ideas better. By presenting the thinking process in a graphical way, we can know more clearly the similarities and differences between ourselves and others. At the same time, it can also help us to remember and understand knowledge better, because the graphical way is easier to be accepted and remembered by the brain than the pure text way.

In addition, mind mapping also helps to stimulate innovation and inspiration, because it can help us integrate scattered information and discover new connections and ideas from it.