Publisher's Synopsis
The Intellectual and Practical Lightning Calculator: The Unity and Decimal System is a book written by John Alexander Henderson in 1882. This book is a comprehensive guide to mental arithmetic, providing readers with a detailed understanding of the unity and decimal system. The author explains how to perform complex calculations in one's head, without the need for a calculator or pen and paper. The book covers topics such as addition, subtraction, multiplication, and division, as well as more advanced topics like square roots and cube roots. It also includes practical exercises and examples to help readers hone their mental arithmetic skills. The book is written in a clear and concise manner, making it accessible to readers of all levels. It is a valuable resource for anyone interested in improving their mental arithmetic abilities, whether for personal or professional reasons.This scarce antiquarian book is a facsimile reprint of the old original and may contain some imperfections such as library marks and notations. Because we believe this work is culturally important, we have made it available as part of our commitment for protecting, preserving, and promoting the world's literature in affordable, high quality, modern editions, that are true to their original work.
