You might also know this stuff as "Pre-Algebra" because that's usually the useless title it's given in normal math.

We're talking about exponents and roots and factoring and all that stuff that's the first thing to go when you stop studying math. 

Why does it fall out so quickly? Because it's almost never used in practical applications, particularly if you're handy with Excel. 

Unfortunately, the GMAT doesn't come with Excel installed so it's time for a review.

That's where this book comes in. Going from basic to advanced, this book explains things the way you wish your Pre-Algebra teacher had. 

The way that makes sense. The way that you'll be hard-pressed to forget, because, you know, it encourages understanding over rote memorization.

Includes:
--What are Exponents (Powers)? 
--Rules for Exponenents
--What are Roots?
--Rules for Roots
--Fractional Exponents and why they're easier than Roots
--Adding and Subtracting Roots and Exponents
--Simplifying Roots
--Polynomial Expressions with Roots (explained in as few syllables as possible!)
--Roots vs. Decimals
--Negative Exponents
--Factoring
--Digits vs. Decimals
--Scientific Notation

Make your Pre-Algebra teacher cry--learn this stuff despite her best efforts! This book will help.