The decimal places of the product are the sum of the decimal places of all multipliers, and other algorithms are the same as integer multiplication.

1. Draw from the center of a piece of white paper (usually A4 paper), leaving blank around.

2. Use images or pictures to express your central idea.

3. Use colors in the drawing process.

4. Connect the central image with the main branch, then connect the main branch with the secondary branch, then connect the tertiary branch with the secondary branch, and so on.

5. Let the branches of the mind map bend naturally, not like a straight line.

6. Use one keyword per line.

application area

Mind mapping is an effective and efficient way of thinking. Apply it to the thinking "map" of memory, learning and thinking. Conducive to the divergent thinking of the human brain. Mind mapping has been widely used around the world. Singapore's Ministry of Education has listed mind mapping as a compulsory subject in primary schools, and a large number of top 500 enterprises are also learning mind mapping. China has been using mind mapping for more than 20 years.