Purpose of calculations ? not numbers, understanding. R. In. The book examines the computational methods most often used in the practice of engineering and scientific and technical calculations. methods of solving problems of linear algebra and nonlinear equations, the problem of eigenvalues, methods of the theory of approximation of functions, numerical differentiation and integration, search for extremities of functions, solution of ordinary differential equations. Considerable attention is paid to the features of the implementation of computational algorithms on the computer and the assessment of the reliability of the results There are a large number of examples and geometric illustrations. For students and postgraduates of technical universities, as well as for engineers and researchers using computational methods ADMINISTRATIONChapter 1. Mathematical modeling and solution of engineering problems with the use of computersChapter 2. Introduction to the Elementary Theory of Errors . Chapter 3. Computational problems, methods and algorithms. Basic Concepts . Chapter 4. Methods of finding solutions to nonlinear equations. Chapter 5. Direct methods for solving systems of linear algebraic equations . Chapter 6. Iterative methods of solving estimates of linear algebraic equations . Chapter 7. Methods of finding solutions to systems of nonlinear equations . Chapter 8. Methods of solving the problem of eigenvalues. Chapter 9. Methods of one-dimensional minimization. Chapter 10. Methods of multidimensional minimization. Chapter 11. Approximation of functions and related issues. Chapter 12. Numerical Differentiation. Chapter 14. Numerical methods for solving the Cauchy problem for ordinary differential equations. Chapter 15. Solving point-to-point boundary problems