The book is devoted to methods of solving computational problems using Excel. The book covers algebraic equations and systems, interpolation and approximation of functional relationships, differentiation and integration, the solution of differential and integral equations, as well as some other topics in the field of computational methods. In addition to , the book describes the main methods of work with the Excel application , Ways of organizing working documents , are discussed methods of data input and editing in working documents are analyzed , The possibilities of using formats and styles , are being studied. illustrates the principles of using built-in computing utilities, and also gives the basics of programming in VBA. The book can be used as a teaching aid in the study of computational mathematics and mathematical programming courses, as a self-teaching or reference aid in solving computational problems by means of Excel application.