1, preparation tools: prepare a blank sheet of paper and a pen.

2. Draw the central theme: draw a rectangle in the center of the white paper as the central theme of the mind map. Write the title of Unit 2 in this rectangle, such as "Fractional Multiplication".

3. Branch themes: Draw two branch themes under the central theme. For example, you can draw two branch themes respectively: "Decimal times integer" and "Decimal times decimal".

4. Details: Under each branch topic, list the specific contents under that topic. For example, its meaning and calculation method can be listed under "decimal times integer", and its meaning, calculation method and some laws can be listed under "decimal times decimal".

5. Connect the theme: Connect the theme with arrows or lines to make the mind map form a whole.

6. Finish drawing: check the content and structure of the mind map to ensure that there are no omissions and errors. If you are satisfied, you can complete the drawing of mind map.

Advantages of mind mapping

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.

Secondly, mind maps can be presented in various forms. The most common form is tree diagram or fishbone diagram, which can help us better understand the relationship between different levels and different angles. In addition, you can also present mind maps in the form of bubble charts, flow charts and concept maps.

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.