The Book of Mathematics . Part 1 by H. A. Kondratieff is a fascinating and deep immersion in the world of numbers, formulas and logical structures, which will be a real discovery for both schoolchildren and students seeking to strengthen their knowledge in mathematics. This textbook is not just a set of theoretical information, but a carefully thought-out material that helps the reader understand and master the basics of mathematics, starting with the simplest concepts and ending with more complex topics. In "Mathematics. Kondratiev offers readers not only a theory, but also practical tasks that will help to consolidate the material studied. Each chapter of the book is designed to gradually introduce the reader to new topics, starting with arithmetic and algebra and moving on to geometry and trigonometry. This makes the book ideal for those who want to systematize their knowledge or prepare for exams. Who can like this book? First of all, it will be useful for schoolchildren and students who study mathematics at the secondary and high school level . However, interest in it can be shown by adults who want to refresh their knowledge or master new mathematical concepts. Teachers of mathematics will also find in the book many useful ideas and techniques for teaching, which makes it an indispensable resource in the educational process. The topics raised in the book cover a wide range of mathematical concepts: from the basics of arithmetic to more complex questions related to functions and equations. Kondratiev focuses on logical thinking and analytical approach, which allows the reader not only to memorize formulas, but also to understand how and why they work. This is especially important in today's world, where mathematical skills are becoming increasingly popular in various fields - from science and technology to economics and business. The author's style is distinguished by clarity and accessibility, which makes the material understandable even for those who do not have deep knowledge in mathematics. Kondratiev uses live examples and visual illustrations, which helps the reader better absorb information. His approach to learning is based on the principles of active involvement, which contributes to a deeper understanding of the subject. Other than mathematics. Part 1", N. A. Kondratiev is the author of several other textbooks and manuals, which have also earned recognition among students and teachers. His works are distinguished by high quality of presentation and relevance of content, which makes them in demand in the educational environment .. This book will be a great help for anyone who wants to feel confident in the world of mathematics. It will help develop critical thinking, teach how to solve problems and apply mathematical knowledge in practice. If you are looking for a high-quality textbook that will help you or your children to master mathematics, "Mathematics. Part 1 . A. Kondratieff is exactly what you need. Do not miss the opportunity to discover the amazing world of numbers and formulas, which will become the basis for further study of more complex mathematical topics.