Living mathematics. Perelman Ya.I.

If there is no ruler at hand, and you need to urgently measure the length of something that you use? Can you encrypt a secret message so that only the initiates will read it? Did you know what would happen within five years if each poppy seed spent in one flower? Mathematics is an exciting and useful science, the knowledge of which is necessary in life. This book will help you bring it to a child. Here you will find curious stories about the practical application of mathematics, as well as interesting and unusual puzzles. Your child will master the basics of quick account, get acquainted with the basic geometry and learn to solve different problems. Each section has answers and step -by -step instructions by decision, as well as detailed schemes and drawings. The book is intended for children, but parents will like it.