Arthur Benjamin, Michael Shermer
Three Rivers Press | 2006 | 304 páginas | rar - epub | 9,96 Mb
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These simple math secrets and tricks will forever change how you look at the world of numbers.
Secrets of Mental Math will have you thinking like a math genius in no time. Get ready to amaze your friends—and yourself—with incredible calculations you never thought you could master, as renowned “mathemagician” Arthur Benjamin shares his techniques for lightning-quick calculations and amazing number tricks. This book will teach you to do math in your head faster than you ever thought possible, dramatically improve your memory for numbers, and—maybe for the first time—make mathematics fun.
Yes, even you can learn to do seemingly complex equations in your head; all you need to learn are a few tricks. You’ll be able to quickly multiply and divide triple digits, compute with fractions, and determine squares, cubes, and roots without blinking an eye. No matter what your age or current math ability, Secrets of Mental Math will allow you to perform fantastic feats of the mind effortlessly. This is the math they never taught you in school
Contents
Chapter 0 Quick Tricks:Easy (and Impressive) Calculations
Chapter 1 A Little Give and Take:Mental Addition and Subtraction
Chapter 2 Products of a Misspent Youth:Basic Multiplication
Chapter 3 New and Improved Products:Intermediate Multiplication
Chapter 4 Divide and Conquer:Mental Division
Chapter 5 Good Enough:The Art of “Guesstimation”
Chapter 6 Math for the Board:Pencil-and-Paper Math
Chapter 7 A Memorable Chapter:Memorizing Numbers
Chapter 8 The Tough Stuff Made Easy:Advanced Multiplication
Chapter 9 Presto-digit-ation:The Art of Mathematical Magic
Chapter ∞ Epilogue by Michael Shermer:How Math Helps Us Think AboutWeird Things
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