Then, according to different books of different ages, we need to understand the logic of mathematical knowledge, such as the distance in junior high school equations and application problems is equal to speed times time, and the total workload is equal to work efficiency times working time. Then, for example, set mapping function, definition domain, correspondence, image, exponential function, logarithmic function, derivative solution is also a logic, sum of general terms of series, inequality solution, equation of straight line equation circle and so on are all interrelated.

Analytic geometry, straight lines on different planes, angles between planes and straight lines, trigonometric functions and plane vectors are actually learned step by step through simple points and lines.