Prentice Hall Algebra 1

1-2 Order of Operations and Evaluating Expressions

Objectives

To simplify expressions involving exponents

To use the order of operations to evaluate expressions

A Solve It exercise.
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Essential Understanding You can use powers to shorten how you represent repeated multiplication, such as 2 times 2 times 2 times 2 times 2 times 2 .

A power has two parts, a base and an exponent. The exponent tells you how many times to use the base as a factor. You read the power 2 cubed  as “two to the third power” or “two cubed.” You read 5 squared  as “five to the second power” or “five squared.”

In the expression 2 superscript 3 = 2 times 2 times 2, 2 is the base, 3 is the exponent, and “2 to the third power” is the power.

You simplify a numerical expression when you replace it with its single numerical value. For example, the simplest form of 2 middle dot 8  is 16. To simplify a power, you replace it with its simplest name.


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Table of Contents

Prentice Hall Algebra 1 Chapter 1 Foundations for Algebra Chapter 2 Solving Equations Chapter 3 Solving Inequalities Chapter 4 An Introduction to Functions Chapter 5 Linear Functions Chapter 6 Systems of Equations and Inequalities Chapter 7 Exponents and Exponential Functions Chapter 8 Polynomials and Factoring Chapter 9 Quadratic Functions and Equations Chapter 10 Radical Expressions and Equations Chapter 11 Rational Expressions and Functions Chapter 12 Data Analysis and Probability Skills Handbook Reference Visual Glossary Selected Answers Index Acknowledgments