The Book of Mathematics . Part 1 by H. A. Kondratieff is not just a textbook, but a real find for anyone who wants to immerse themselves in the world of numbers and formulas. This work will become a reliable companion for schoolchildren, students and anyone who seeks to deepen their knowledge in the field of mathematics. In it, the author masterfully combines theory and practice, which makes the learning process not only useful, but also fascinating. From the first pages of the book, the reader finds himself on an exciting journey through the basics of mathematics. Kondratiev not only expounds the material, he creates an atmosphere in which everyone can feel like a researcher. In "Mathematics. Part 1" deals with key topics such as arithmetic, algebra, and geometry, which are the basis for further study of more complex mathematical concepts. The author pays special attention to the explanation of concepts, which allows the reader not only to remember the formulas, but also to understand their essence. This book will be especially interesting for high school students who are preparing for exams, as well as first-year students studying mathematics. It will be an excellent help for those who want to improve their problem solving skills and prepare for the Olympics. Due to the accessible language and logical presentation of the material, “Mathematics . Part 1" will also be suitable for self-study and will help those who have not been engaged in mathematics for a long time and want to refresh their knowledge. The topics raised in the book cover not only basic mathematical operations, but also more complex concepts such as functions and equations. Kondratiev focuses on the practical application of mathematical knowledge in real life, which makes the study of the subject more relevant and interesting. He emphasizes how mathematics permeates all areas of our lives from economics to engineering, from physics to art. This connection will help the reader to see how important mathematical knowledge is in the modern world. Kondratieff's style is clear and logical. It uses many examples and tasks, which allows the reader not only to assimilate the theory, but also to apply it in practice. This approach makes the book not only a textbook, but also a real source of inspiration for future mathematicians and engineers. Kondratiev is also known for his other works, such as "Algebra for Beginners" and "Geometry in Life", which also deserve attention and can complement the study of mathematics. If you are looking for a book that will help you master mathematics from scratch or deepen your knowledge, "Mathematics. Part 1 will be a great choice. It will attract the attention of not only schoolchildren and students, but also everyone who is interested in mathematics as a science. This tutorial will be not only useful, but also a fascinating guide that will open up new horizons in understanding numbers and formulas. Do not miss the opportunity to immerse yourself in the world of mathematics with H. A. Kondratieff . This book is your reliable assistant on the way to mathematical mastery, which will help you not only to pass exams successfully, but also to develop logical thinking and analytical abilities. Read, learn and discover the amazing world of mathematics!