How to Calculate Quickly (eBook)

Full Course in Speed Arithmetic

Henry Sticker (Autor)

eBook Download: EPUB

2013
192 Seiten
Dover Publications (Verlag)
978-0-486-31872-1 (ISBN)

Infos

Many useful procedures explained and taught: 2-column addition, left-to-right subtraction, mental division of large numbers, more. Also numerous helpful shortcuts. More than 8,000 problems, with solutions. 1945 edition.

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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 "e;number sense"e; — 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.

Inhalt

The Plan of This BookADDITION 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 MultiplicationTable of Prime and Composite NumbersANSWERS

Produkt-Details

• Erscheint lt. Verlag: 15.4.2013
• Sprache: englisch
• Themenwelt: Sachbuch/Ratgeber ► Freizeit / Hobby ► Spielen / Raten
• Themenwelt: Sachbuch/Ratgeber ► Natur / Technik ► Naturwissenschaft
• Themenwelt: Mathematik / Informatik ► Mathematik ► Allgemeines / Lexika
• Schlagworte: ADD • Algebra • BASIC • benjamins • books on calendar dates • books on learning maths • books on math abilities • books on math classes • books on math concepts • books on math curriculums • books on mathematical ideas • books on math lovers • books on math people • books on math skills • books on math students • books on math teachers • books on math tests • books on math tricks • books on mental arithmetics • books on mental maths • books on mental tricks • books on michael shermer • books on multiplication tables • books on school curriculums • books on school maths • books on solving maths • books on square laws • business • Calc • Calculate • calculations • calculator • calculators • Calculus • calendar date • compute • Courses • critical thinking • cuts • digits • Division • doing math • doing mental • do mental • drills • Elementary School • Ellipse • Everyday life • Exercises • Fast • fibonacci sequence • Figures • Fractions • Geometry • GMAT • Gregorian calendar • hated math • hate math • Home • inverse square • learning • learning math • learn math • left-to-right • Magic tricks • Math • math abilities • math books • math classes • math concepts • math curriculum • mathemagician • mathematical ideas • mathematical tricks • Mathematics • math genius • math lovers • math person • Maths • math skills • math student • math teachers • math test • math tricks • math whiz • memorize • memorizing • Mental • Mental Arithmetic • mental math • mental tricks • Methods • michael shermer • mnemonics • multiplication • Multiplication Tables • multiply • multiplying • Numbers • Principles • school • School Curriculum • school math • school students • Short cuts • Shortcuts • Simple • Skills • solve math • solving math • square law • squaring • Statistics • Step-by-step • subtract • subtracting • subtraction • sum • Teachers • Ted • temporarily forget • Tests • Think • three-digit • Trigonometry • two-digit • Work • wrinkles
• ISBN-10: 0-486-31872-9 / 0486318729
• ISBN-13: 978-0-486-31872-1 / 9780486318721