Henry Sticker

How to Calculate Quickly (eBook, ePUB)

Full Course in Speed Arithmetic

• Format: ePub

Produktbeschreibung

Do you want to double or triple the speed with which you calculate? How to Calculate Quickly is a tried and true method for helping you in the mathematics of daily life addition, subtraction, multiplication, division, and fractions.
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.
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.
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.

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Produktdetails

• Verlag: Guilford Publications
• Seitenzahl: 192
• Erscheinungstermin: 15. April 2013
• Englisch
• ISBN-13: 9780486318721
• Artikelnr.: 39865535

Inhaltsangabe

The Plan of This Book ADDITION Addition in General "Adding Single Columns by Pairs
starts on" "Adding Single Columns by Trios
starts on" "Mental Addition of Large Numbers
starts on" "Two-Column Addition
starts on" SUBTRACTION Subtraction in General "Left-to-Right Subtraction
starts on" MULTIPLICATION Multiplication in General "Factoring
starts on" "Direct Multiplication by Numbers Greater than 12
starts on" "Multiplying Three Figures by One
starts on" "Multiplying Two Figures by Two
starts on" "Multiplying Three Figures by Two
starts on" "Multiplying Three Figures by Three
starts on" DIVISION Division in General "Direct Division by Numbers Greater than 12
starts on" "Mental Division of Large Numbers
starts on" "Division by Three Figures
starts on" "Division by Two Figures
starts on" FRACTIONS Fractions in General "Addition and Subtractions of Fractions
starts on" DECIMALS Decimals in General "Decimal Equivalents of Fractions
starts on" SHORT CUTS Horizontal Addition Combined Addition and Subtraction Multiplying by a Near Number Aliquot Parts in Multiplication Simplifying the Multiplier Multiplication by Factoring Factors between 11 and 19 Multiplying by 11 "Multiplying by 21
31
41
etc." "Squares of Numbers
starts on" "Multiplying When Corresponding Orders Are Alike
starts on" Multiplying a Sum by a Difference "Multiplications Involving Fractions
starts on" Aliquot Parts in Division Cubes of Numbers Algebraic Multiplication Table of Prime and Composite Numbers ANSWERS

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