Mathematical tricks for quick account. Vogt I.

Forget about the calculator, this book will teach you high -speed calculations in your mind or with a pencil. To count faster, it’s enough to think a little differently, her author Ingve Vogt is sure - the Norwegian journalist of the Apollon scientific journal and fan of mathematics. You will learn about simple and boring methods of fast account, for which only knowledge of basic arithmetic rules will be needed. The Trakhtenberg method, the Chinese method using dashes and many other mathematical techniques will help you easily add and subtract, multiply and divide, extract a square root and build large numbers into a square.

This book is for lovers of numbers of all ages, as well as for those who want to master the superbye account - for study, work or convenience in everyday life.