Customized Manual Math A is a specially customized math manual. The main purpose of "Mathematics A" customized manual is to help readers better understand and apply mathematics knowledge and improve mathematics literacy and problem-solving ability. Compared with the traditional mathematics manual, it pays more attention to practice and application, so that readers can better apply mathematics knowledge to real life. It refers to a mathematical manual customized according to the needs and requirements of users. Math A of customized manual includes the basic mathematics, covering basic mathematical concepts and principles, including algebra, geometry, probability statistics and so on. It introduces the application of mathematics in various fields, including engineering, finance, medicine and so on. And provide solutions to practical problems, and explain how to use mathematical knowledge and skills to solve these problems. Customized manual mathematics can also be updated and optimized according to the needs of users, keep pace with the times and meet the changing needs of users. This is a kind of flexibility.