Arithmetricks
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Ask a friend to pick a random number, add this, subtract that-and presto, astound your friend by guessing the new number! Math riddles, mental math tricks, magi
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Type: BOOK - Published: 1995-06-01 - Publisher: Turtleback Books
Provides instructions for shortcuts of varying degrees of difficulty for doing arithmetical calculations and estimates, and for checking answers.
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Type: BOOK - Published: 2008 - Publisher: 케이론교육
Maths with the laughs added in! \* Why nothing sometimes means something? \* Can you beat Professor Fiendish's foul formula? \* What can stop a hairy green spot
Language: en
Pages: 247
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Type: BOOK - Published: 1992-11-11 - Publisher: John Wiley & Sons
Demonstrates a slew of time-saving tips and tricks for performing common math calculations. Contains sample problems for each trick, leading the reader through
Language: en
Pages: 306
Pages: 306
Type: BOOK - Published: 2006-08-08 - Publisher: Crown
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
