Excerpt from The Intellectual Multiplier: Comprising Concise and Easy Methods of Multiplying Numbers Mentally; Designed for the Use of Pupils in Public and Private Schools
The "Intellectual Multiplier" is designed to furnish pleasing and useful mental exercises for pupils in public and private schools.
A very little practice will enable pupils to answer all the questions in each article promptly, also to solve all similar questions rapidly and correctly, which will be of great practical use in a variety of calculations.
The contractions, in multiplying by numbers larger than 129, are useful, and furnish interesting exercises for mental training. The correctness of these contractions may be verified by multiplying in the usual manner.
About the Publisher
Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com
This book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully; any imperfections that remain are intentionally left to preserve the state of such historical works. Это и многое другое вы найдете в книге The Intellectual Multiplier (James Robinson)