In the Sixth Edition of Tussy/Koenig's PREALGEBRA, new Look Alikes help you compare and contrast problem types to help you understand the correct meaning of the questions and determine the necessary steps to work the problem. The authors help you understand the language of algebra and teach you how to read, write, and think mathematically.
1. WHOLE NUMBERS.
An Introduction to the Whole Numbers. Adding and Subtracting Whole Numbers. Multiplying Whole Numbers. Dividing Whole Numbers. Prime Factors and Exponents. The Least Common Multiple and the Greatest Common Factor. Order of Operations. Solving Equations Using Addition and Subtraction. Solving Equations Using Multiplication and Division. Chapter Summary and Review. Chapter Test.
2. THE INTEGERS.
An Introduction to the Integers. Adding Integers. Subtracting Integers. Multiplying Integers. Dividing Integers. Order of Operations and Estimation. Solving Equations That Involve Integers. Chapter Summary and Review. Chapter Test. Cumulative Review.
3. THE LANGUAGE OF ALGEBRA.
Algebraic Expressions. Evaluating Algebraic Expressions and Formulas. Simplifying Algebraic Expressions and the Distributive Property. Combining Like Terms. Simplifying Expressions to Solve Equations. Using Equations to Solve Application Problems. Chapter Summary and Review. Chapter Test. Cumulative Review.
4. FRACTIONS AND MIXED NUMBERS.
An Introduction to Fractions. Multiplying Fractions. Dividing Fractions. Adding and Subtracting Fractions. Multiplying and Dividing Mixed Numbers. Adding and Subtracting Mixed Numbers. Order of Operations and Complex Fractions. Solving Equations That Involve Fractions. Chapter Summary and Review. Chapter Test. Cumulative Review.
5. DECIMALS.
An Introduction to Decimals. Adding and Subtracting Decimals. Multiplying Decimals. Dividing Decimals. Fractions and Decimals. Square Roots. Solving Equations That Involve Decimals. Chapter Summary and Review. Chapter Test. Cumulative Review.
6. RATIO, PROPORTION, AND MEASUREMENT.
Ratios and Rates. Proportions. American Units of Measurement. Metric Units of Measurement; Medical Applications. Converting between American and Metric Units. Chapter Summary and Review. Chapter Test. Cumulative Review.
7. PERCENT.
Percents, Decimals, and Fractions. Solving Percent Problems Using Percent Equations and Proportions. Applications of Percent. Estimation with Percent. Interest. Chapter Summary and Review. Chapter Test. Cumulative Review.
8. GRAPHS AND STATISTICS.
Reading Graphs and Tables. Mean, Median, and Mode. Probability. Equations in Two Variables: The Rectangular Coordinate System. Graphing Linear Equations. Chapter Summary and Review. Chapter Test. Cumulative Review.
9. AN INTRODUCTION TO GEOMETRY.
Basic Geometric Figures; Angles. Parallel and Perpendicular Lines. Polygons and Triangles. The Pythagorean Theorem. Congruent Triangles and Similar Triangles. Quadrilaterals and Other Polygons. Perimeters and Areas of Polygons. Circles. Volume. Chapter Summary and Review. Chapter Test. Cumulative Review.
10. EXPONENTS AND POLYNOMIALS.
Multiplication Rules for Exponents. Introduction to Polynomials. Adding and Subtracting Polynomials. Multiplying Polynomials. Chapter Summary and Review. Chapter Test. Cumulative Review.
Appendix 1
Roots and Powers.
Appendix 2
Answers to Selected Exercises.

Alan S. Tussy
Alan Tussy has taught all levels of developmental mathematics at Citrus College in Glendora, CA. He has written nine math books. An extraordinary author dedicated to his students' success, he is relentlessly meticulous and creative—a visionary who maintains a keen focus on the greatest challenges students face in Mathematics. Alan received his Bachelor of Science degree in Mathematics from University of Redlands and his Master of Science degree in Applied Mathematics from California State University, Los Angeles. He has taught across course and curriculum areas from prealgebra to differential equations. He is currently focusing on teaching courses related to Developmental Mathematics. Professor Tussy is a member of the American Mathematical Association of TwoYear Colleges (AMATYC).

Diane Koenig
A nationally recognized educator and author, Diane Koenig actively shaped several textbooks, ancillaries and series. Since 1982 when she helped develop the Gustafson/Frisk series to her work on the Tussy/Koenig/Gustafson series, Diane’s writing continues to reflect the expertise she gains from working with students in her Mathematics courses. Throughout her work, she integrates researchbased strategies in Mathematics education. She earned a Bachelor of Science degree in Secondary Math Education from Illinois State University in 1980, and began her career at Rock Valley College in 1981, when she became the Math Supervisor for a newly formed Personalized Learning Center. Earning her Master's Degree in Applied Mathematics from Northern Illinois University in 1984, Diane, enjoys the distinction of being the first woman to become a fulltime faculty member in the Mathematics department for Rock Valley College. In addition to being awarded AMATYC's Excellence in Teaching Award in 2015, she was chosen as the Rock Valley College Faculty of the Year by her peers in 2005, and the next year she was awarded the NISOD Teaching Excellence Award and the Illinois Mathematics Association of Community Colleges Award for Teaching Excellence. In addition to her teaching, she is an active member of the Illinois Mathematics Association of Community Colleges (IMACC), serving on the board of directors, on a statelevel task force rewriting the course outlines for the Developmental Mathematics courses, and as the Association's newsletter editor.

JUST IN TIME SUPPORT built into questions contains direct links to the eTextbook (Read It) and videos (Watch It).

LEARN IT MODULES address your students’ knowledge gaps with justintime instruction that meets their diverse learning styles. Available as an additional resource within questions, Learn Its provide targeted instruction and practice on that topic using narrative, videos and tutorials—all in one place. If the topic is still too challenging, students can choose to continue learning through associated prerequisite Learn Its until they feel confident in their knowledge and preparedness.

RESPONSIVE QUESTIONS personalize the learning experience for your students by asking them to use their own real data, which provides the variables they will use to answer each question part.

CONCEPT CHECK questions provide students with short, multistep videos reviewing key math concepts. Students are required to answer a question after each video to ensure their understanding of each concept.

EXPANDED PROBLEMS include intermediary steps to guide students to the final answer.

MASTER IT TUTORIALS break problems down into steps to help guide students through the mathematical process.

VIDEO EXAMPLES provide embedded videos paired with followup questions to ensure student understanding.

COURSE PACKS are modifiable, readytouse assignments built by subject matter experts to help save time.

CLASS INSIGHTS provide understanding of student knowledge gaps.

FROM CAMPUS TO CAREERS chapter openers highlight vocations requiring a variety of mathematics skills. The job outlook, educational requirements, and annual earnings data provide practical information to help students make career decisions.

STUDY SETS are enhanced with application problems that give students appropriate context for the topics they are studying and how they apply in a variety of occupations and vocations.

STRATEGY AND WHY explanations to the solution of each worked example provides a concise answer about why a particular approach is taken.

NOW TRY problems complete the final step in the learning process. They appear after each worked example and are linked to a similar problem found within the Guided Practice section of the Study Sets. PRACTICE PROBLEMS address every topic within each section and maintain a clear progression of level. The Practice section is divided into two categories: Guided Practice and Try It Yourself. Guided Practice takes each practice problem and keys it directly to the appropriate example in the section. Try It Yourself problems help students determine their own strategies when solving problems, just as they would when they take a test.

The practice problems address every topic within each section and maintain a clear progression of level. The Practice section is divided into two categories: Guided Practice and Try It Yourself. Guided Practice takes each practice problem and keys it directly to the appropriate example in the section. Try It Yourself problems help students determine their own strategies when solving problems, just as they would when they take a test.

Each worked example ends with a Now Try problem, completing the final step in the learning process. Each one is linked to a similar problem found within the Guided Practice section of the Study Sets.
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