How to Calculate Quickly: Full Course in Speed Arithmetic (Dover Books on Mathematics)

How to Calculate Quickly: Full Course in Speed Arithmetic (Dover Books on Mathematics)

<DIV><DIV><P>Do you want to double or triple the speed with which you calculate? <I>How to Calculate Quickly </I>is a tried and true method for helping you in the mathematics of daily life — addition, subtraction, multiplication, division, and fractions. <BR>The author can awaken for you a faculty which is surprisingly dormant in accountants, engineers, scientists, businesspeople, and others who work with figures. This is "number sense" — or the ability to recognize relations between numbers considered as whole quantities. Lack of this number sense makes it entirely possible for a scientist to be proficient in higher mathematics, but to bog down in the arithmetic of everyday life. <BR>This book teaches the necessary mathematical techniques that schools neglect to teach: Horizontal addition, left to right multiplication and division, etc. You will learn a method of multiplication so rapid that you'll be able to do products in not much more time than it would take to write the problem down on paper. <BR>This is not a collection of tricks that work in only a very few special cases, but a serious, capably planned course of basic mathematics for self-instruction. It contains over 9,000 short problems and their solutions for you to work during spare moments. Five or ten minutes spent daily on this book will, within ten weeks, give you a number sense that will double or triple your calculation speed. <BR></DIV></DIV></P>