"Encyclopedia of elementary mathematics" is not just a book, but a real treasure trove of knowledge created by outstanding mathematicians Alexandrov, Marukushevich and Hinchin. This work will become an indispensable assistant for both students and teachers, as well as for everyone who is interested in mathematics and seeks to understand its foundations more deeply. From the first pages of the reader covers the atmosphere of scientific search and enthusiasm. The authors explain the fundamental concepts with brilliance and simplicity, ranging from arithmetic and geometry to more complex topics such as number theory and combinatorics. Each chapter is written taking into account the fact that mathematics is not just a set of formulas, but a whole world full of logical riddles and amazing discoveries. By reading this encyclopedia, you will be able not only to master the basic mathematical concepts, but also to see how they intertwine with other sciences and everyday life. The book will be interesting to a wide range of readers .. Students who study mathematics will find in it useful explanations and examples that will help them cope with educational tasks . Teachers will be able to use it as a guide for preparing for classes, and mathematics lovers will just enjoy reading and expand their horizons. The age category of readers is not limited: from students preparing for exams to adults who want to refresh their knowledge or discover something new. The topics raised in the Encyclopedia of Elementary Mathematics cover not only theoretical aspects, but also the practical application of mathematical knowledge. The authors emphasize the importance of logical thinking and analytical approach, which makes the book especially relevant in today's world, where problem-solving and critical thinking skills are becoming increasingly important. Readers will be able to see how mathematics permeates various spheres of life - from economics to the natural sciences, from engineering to art. The style of the authors is clear and accessible. They masterfully explain complex things in simple language, which makes their work unique and in demand. Alexandrov, Marukushevich and Khinchin are not only the authors of this book, but also recognized experts in the field of mathematics, who wrote many other significant works. Their approach to teaching and explaining mathematics inspires and motivates, making the Encyclopedia of Elementary Mathematics a true masterpiece. If you are looking for books on mathematics that will help you understand the basics or delve into more complex topics, the Encyclopedia of Elementary Mathematics will be an excellent choice for you. It can become not only a textbook, but also a source of inspiration for further study. Do not miss the opportunity to discover the world of mathematics with this wonderful book, which will certainly take its rightful place on your bookshelf.