Arithmetricks : 50 Easy Ways to Add, Subtract, Multiply, and Divide without a Calculator

Become a mental-math master and astound your friends, family, and teachers with . . . "A fascinating and useful book. I recommend it." —Jaime Escalante (of Stand and Deliver fame) Hiram W. Johnson High School "...will fascinate students of all ages. A resource 'must' for all math programs." —Howard Wang, Founding Director of Sierra Canyon College Preparatory School "The tips and tricks were really cool." —Liz Matthews, age 12, Anacapa Middle School Packed with 50 tricks and tips that let you add, subtract, multiply, and divide in a flash, makes math easier and more fun than you've ever imagined. You won't need a calculator, or in many cases even a pencil, to come up with the correct answers. Just a few simple shortcuts will have you solving basic problems in record time. Will not only amaze you, it will also help you at school and in your daily life. Most of all, you'll have plenty of fun along the way!