Description

Immediate dispatch from Somerset. Nice book in great condition. Pages in excellent condition. No notes or highlighting. See images. Fantastic book.

About the book >.>.> This book has been written as a guide for those who though interested in knowing more about the use and theory of the Japanese abacus have until now been unable to find any full explanation in the English language. Chapter I presents the most important facts about the speed and efficiency of abacus calculation with special reference to a comparison of the abacus and the electric calculating machine. Chapter II gives a brief survey of the history and development of the abacus and Chapter III introduces the basic principles of abacus calculation. The next three chapters explain in detail with numerous examples how the four processes of arithmetic are worked out on the abacus. Particular attention should be given to Chapter IV on addition and subtraction as it embodies the essential rules of bead manipulation. Many notes have been included to give a theoretical and scientific explanation of the rules and fundamental principles as such knowledge is not only