Mental Arithmetic Techniques

This book is a practical manual written by G. N. Berman, a Soviet scholar and the author of widely known collections of math and mathematical analysis problems. It will help the reader learn techniques of mental and written calculation and become a reliable assistant in mastering the art of fast counting. Today, being able to calculate quickly and accurately is important both in everyday life and professionally. This skill also helps maintain clarity and sharpness of mind. After reading this book, you will learn how to:
• multiply multi-digit numbers mentally;
• perform percentage calculations;
• find roots of fractions;
• calculate approximate numbers, and much more.
“Counting Techniques” will be a useful addition to the school curriculum and an excellent tool for adults who want to improve their mathematical abilities.