First, prepare tools and materials.

1. Use a large piece of paper or whiteboard as the drawing area of the mind map.

2. Colored chalk or marker is used to draw the content of mind map.

Second, determine the theme and central concept.

1. Determine the theme of the mind map: In this scenario, the theme is decimal multiplication.

2. Decide the central concept: write decimal multiplication at the center of the mind map.

Third, draw the first branch and the second branch.

1. Draw a first-level branch: from the central concept, draw several radial lines to represent each first-level branch. Each primary branch represents a concept related to decimal multiplication, such as the rules and properties of decimal multiplication.

2. Draw secondary branches: For each primary branch, draw secondary branches related to it. These secondary branches extend from the primary branch, representing more specific concepts and knowledge points, such as the alignment of decimal points and the control of decimal places.

Fourth, fill in the contents and examples.

1. Fill in the corresponding content on each branch: write down the relevant text description according to the concept or knowledge point of each branch. Ensure that related concepts are expressed accurately and concisely.

2. Add examples and calculation steps: Add some examples next to or below the branch to explain and demonstrate the calculation steps of fractional multiplication. You can use specific decimals as examples to deepen your understanding.

Verbs (short for verb) supplement details and colors.

1. Supplementary details: Check all branches of the mind map to ensure that all important concepts and knowledge points of fractional multiplication have been covered. If necessary, you can add additional branches and explanations.

2. Use colors to distinguish different concepts and branches: By using notes or marks of different colors, different parts of the mind map are colored to increase visual effects and readability.

Sixth, review and improve.

1. Review the contents of the mind map: read and understand the concepts and knowledge points on the mind map to ensure a comprehensive grasp of decimal multiplication.

2. Improve the mind map: If necessary, you can further modify and improve the mind map according to your own learning and understanding.