Chapter 12

# Getting Back to Basics: Numbers and Operations

IN THIS CHAPTER

**Refreshing your memory on types of numbers and basic operations**

**Getting the skinny on bases, exponents, and radicals**

**Keeping order of operations in mind**

**Grabbing your share of fractions, decimals, and percentages**

**Making comparisons by using ratios and proportions**

**Bringing numbers down to size with scientific notation**

Those of you who majored in math in college probably look at the math section of the GMAT like an old friend. Those of you who haven’t stepped into a math class since high school are more likely dreading it. You know who you are! Don’t worry, this chapter takes you back to the beginning with a review of the concepts you’ve learned through the years but may have temporarily forgotten. In this chapter, you see problems that test your knowledge of the math building blocks, such as number types, basic ...

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