How to Calculate Quickly: Full Course in Speed Arithmetic

( 2 )

Overview

Do you want to double or triple the speed with which you calculate? Can you run a rapid mental check over the results of your calculating machines? Can you check bills worked out for you by grocery store cash registers, on waiters' checks, on department store charge accounts? Or do you simply take their word for the disposal of your money? Don't envy friends who can perform these calculations with lightning speed and complete accuracy. Theirs is not wholly an inborn ability. You...
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How to Calculate Quickly: Full Course in Speed Arithmetic

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Overview

Do you want to double or triple the speed with which you calculate? Can you run a rapid mental check over the results of your calculating machines? Can you check bills worked out for you by grocery store cash registers, on waiters' checks, on department store charge accounts? Or do you simply take their word for the disposal of your money? Don't envy friends who can perform these calculations with lightning speed and complete accuracy. Theirs is not wholly an inborn ability. You can acquire these skills by the methods described in this book.

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 the for you a faculty which is surprisingly dormant in accountants, engineers, scientists, businessmen and others who work with figures. This is "number sense"--or the abiltiy 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 those necessary mathematical techniques which 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 which 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 on streetcars, taxis, at lunch, 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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Product Details

  • ISBN-13: 9781607964209
  • Publisher: Beta Nu Publishing
  • Publication date: 3/15/2012
  • Pages: 194
  • Sales rank: 1,465,543
  • Product dimensions: 6.00 (w) x 9.00 (h) x 0.45 (d)

Table of Contents

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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Sort by: Showing all of 2 Customer Reviews
  • Anonymous

    Posted May 19, 2010

    Review

    It was a very helpful book to increase your mental calculations. It was easy to understand with helpful exercise.

    1 out of 1 people found this review helpful.

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  • Anonymous

    Posted July 17, 2013

    No text was provided for this review.

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