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, magic squares, brain teasers, geometry puzzlers, amazing math facts, money math, calculator math, math competitions, and more fill this book of reproducible handouts with challenging, fun math-related problems. Grades 4-6. Answer key. Illustrated.

Provides instructions for shortcuts of varying degrees of difficulty for doing arithmetical calculations and estimates, and for checking answers.

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 epidemic? Find out in the Essential Arithmetricks - all the tricks, tips and short-cuts they don't teach at school.

Demonstrates a slew of time-saving tips and tricks for performing common math calculations. Contains sample problems for each trick, leading the reader through step-by-step. Features two mid-terms and a final exam to test your progress plus hundreds of exercise problems ranging from simple to more sophisticated. Also includes sections on ``Mathematical Curiosities'' and ``Parlor Tricks'' for math lovers.

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.

Presents step-by-step instructions for performing hundreds of tricks, provides tips on establishing a stage presence, and offers methods and styles of master magicians

Uses brain teasers and engaging activities to help teach young readers intermediate mathematics skills.

Clear, concise compendium of about 150 time-saving math short-cuts features faster, easier ways to add, subtract, multiply, and divide. Each problem includes an explanation of the method. No special math ability needed.

Is maths making you miserable? Are you scared of squares and perplexed by primes? Do numbers leave you...non-plussed? Then it's time to be utterly amazed, as you're whisked off to infinity and back with Numbers: The Key to the Universe. Find out how you could win a million dollars and become famous for ever (twice), discover the key to the evil Professor's Fiendish Number Chain, and travel to a distant planet for the biggest gig in all eternity. Meanwhile, things get ugly when the gangsters meet the unlucky number 13. Guarantee: This book contains no nasty exercises and no boring sums!