Читать книгу SAT Math For Dummies with Online Practice - Mark Zegarelli - Страница 35

IN THIS CHAPTER

Working with natural numbers, integers, rational numbers, real numbers, and complex numbers

Reviewing fractions, ratios, decimals, and percentages

Understanding absolute value

Calculating with radicals

Clarifying basic algebra terminology

Graphing on the xy-plane

Using your calculator on the SAT

This chapter provides a review of pre-algebra topics you’ve probably seen before, but maybe half-remember in a fuzzy sort of way. Although some of these concepts may have given you trouble in 7th or 8th grade, you may be surprised how easy some of this stuff seems now — especially if your current math class is Algebra II or Pre-Calculus!

To begin, I discuss five key sets of numbers: natural numbers, integers, rational numbers, real numbers, and complex numbers. Then, you get a review of four ways to represent rational numbers: as fractions, ratios, decimals, and percentages.

After that, I give you a brief review of absolute value, followed by a more in-depth look at radicals (square roots). Then, I provide a clarification of the algebra vocabulary you may recognize but still be unclear about.

I finish up with a look at a short but important list of calculator moves you’ll need to know for the Calculator section of the math SAT.