Book excerpt: Inside the Book: Preliminaries Whole numbers Decimals Fractions Percents Integers and rationals Powers, exponents, and roots Powers of ten and scientific notation Measurements Graphs Probability and statistics Number series Variables, algebraic expressions, and simple equations Word problems Review questions Resource center Glossary Why CliffsNotes? Go with the name you know and trust Get the information you need-fast! Master the Basics–Fast Complete coverage of core concepts Easy topic-by-topic organization Access hundreds of practice problems at CliffsNotes.com