Practical Mathematics Guide is better than the tenth edition of the original mathematics manual. Mathematics guide: Practical mathematics manual pays attention to use, which is equivalent to the basic mathematics reference book for undergraduate students of science and engineering. You can have a look if you don't know anything. There are definitions, theorems and formulas of basic concepts, which can be used as teaching reference books. The selection of its content takes into account the basic needs of readers at different levels, from primary facts to highly mature modern results and methods, but avoids being uncommon and too professional. Similar to the basic knowledge manual of Chinese, the knowledge point summary system is easy to find.