Theoretical lectures: Field of real numbers. Metric space. Sequences of real numbers - convergence; basic properties. Real functions of a real variable - limit, continuity, differential calculus and application, indefinite integral; definite integral and application; improper integral. Real functions of several real variables - differential calculus and application). Ordinary differential equations of first and higher order. Linear differential equations of n-th order. Elements of numerical analysis. Series of real numbers. Practice (Exercises): Corresponding examples from theoretical lectures are done in exercises, thus practicing the taught lectures and understanding them better.