This textbook is tailored for those educational programs, such as Economics and Management, that include an introductory (and frequently the only) course in Mathematics. The volume focuses on a number of selected, fundamental topics: the knowledge of Calculus, for functions of one and two variables; the use of Calculus in optimization; the notion of integral for functions of one variable; the language and the elementary techniques of Linear Algebra; the basics of Financial Calculus. Several preliminary examples from applied sciences (mainly from Economics) introduce the theoretical aspects. An excessive formalism is avoided, in order to quickly reach the fundamental concepts. Mybook contains the solutions to the end-of-chapter exercises.