1. Select the mind map tool: search through the browser, directly enter the MindNow tool website, and you can choose to create online or download the client for free. New mind map: In the new mind map interface, you can choose a brain map structure according to your own needs, such as downward classification map, fishbone map, bubble map, organization chart and so on.

2. Determine the theme content and start creation: Starting from the central theme, determine the content of the central theme and start creation, and add themes and sub-themes at the same level. Optimize and improve mind map: style: you can adjust and set the text, font, theme, color, lines and borders in the map, which can be used to highlight key points.

3. Style: You can choose a variety of theme styles and set rainbow branches to make mind maps more intuitive and easier to see, drink and understand. Icons: You can add various icons to make them vivid. Save and export the shared mind map: Save: automatically save in real time during the operation, or click the button in the upper right corner to save.

Mathematics related knowledge

1. Mathematics is a subject that studies quantity, structure, change and spatial model. It is widely used in natural science, social science, engineering and other fields. The basic concepts of mathematics include number, set, arithmetic, algebra, geometry, probability theory and statistics.

2. Numbers refer to the concept used to describe the quantity of matter. The concepts of number in mathematics include integer, fraction and rational number. Integer is a number representing positive integer, negative integer and zero, fraction is a number representing numerator and denominator, and rational number is a number representing the ratio of two integers.

3. Set refers to the concept of combining a group of numbers or things into a whole. The elements in the collection can be numbers, letters, symbols, graphics and so on. Many important concepts in mathematics, such as the operation of subsets and sets, are derived from the concept of sets.

4. Arithmetic is the most basic branch of mathematics, which studies the properties and operation methods of numbers. The most basic operations in arithmetic include addition, subtraction, multiplication and division. Through these basic operations, we can deduce more advanced operations, such as exponential operation, square root operation and so on.