O'Reilly logo

1,001 Basic Math and Pre-Algebra Practice Problems For Dummies by Mark Zegarelli

Stay ahead with the world's most comprehensive technology and business learning platform.

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, tutorials, and more.

Start Free Trial

No credit card required

Chapter 4

Following Orders: Order of Operations

The order of operations (also called the order of precedence) provides a clear way to evaluate complex expressions so you always get the right answer. The mnemonic PEMDAS helps you to remember to evaluate parentheses first; then move on to exponents; then multiplication and division; and finally addition and subtraction.

The Problems You’ll Work On

This chapter includes these types of problems:

check.png Evaluating expressions that contain the Big Four operations (addition, subtraction, multiplication, and division)

check.png Evaluating expressions that include exponents

check.png Evaluating expressions that include parentheses, including nested parentheses

check.png Evaluating expressions that include parenthetical expressions, such as square roots and absolute value

check.png Evaluating expressions that include fractions with expressions in the numerator and/or denominator

What to Watch Out For

Keep the following tips in mind as you work with the problems in this chapter:

When an ...

With Safari, you learn the way you learn best. Get unlimited access to videos, live online training, learning paths, books, interactive tutorials, and more.

Start Free Trial

No credit card required