Calculation Techniques

This book is a methodological guide written by G. N. Berman, a Soviet scientist and author of widely known collections of problems in mathematics and mathematical analysis.
It will help the reader learn techniques for mental and written calculation and become... a reliable assistant in mastering the art of quick calculation.
Today, being able to calculate quickly and accurately is important in both daily and professional life. This skill also helps maintain clarity and sharpness of mind. After reading
this book, you will learn how to:
• mentally multiply multi-digit numbers;
• perform percentage calculations;
• find roots of fractions;
• calculate approximate numbers
and much more.
"Calculation Techniques" will be a useful supplement to the school curriculum and an excellent tool for adults looking to improve their mathematical skills.