Economic applied mathematics, with the core of "mastering concepts, strengthening application and cultivating skills", fully embodies the principle of taking application as the purpose and taking necessity and sufficiency as the degree. This book tries to teach a brand-new and easy-to-understand learning method and mathematical thought, and tries to make the teaching materials concise and practical, which is convenient for self-study. \x0d\x0d\ learning contents mainly include: \x0d\ function \x0d\ limit \x0d\ integral \x0d\ line generation \x0d\ probability \ x0d \ ordinary differential equation \ x0d \ and so on.