Openstax Prealgebre 2E — Lessons, Skills & Practice | Pengi

OpenStax Prealgebra 2nd Edition is a free, open-source mathematics textbook published by OpenStax (Rice University), designed for middle school and early high school students typically in grades 6 through 9. It covers foundational math topics including whole numbers, integers, fractions, decimals, and percents, alongside introductory algebra concepts such as the language of algebra, properties of real numbers, and solving linear equations. The textbook also introduces students to polynomials, graphing on the coordinate plane, and practical applications through math models and basic geometry.

Openstax Prealgebre 2E covers 11 chapters and 60 lessons on Pengi.

Openstax Prealgebre 2E textbook table of contents

Chapter 1: Whole Numbers

Chapter 2: The Language of Algebra

  • Lesson 1: Use the Language of AlgebraLearnPractice
  • Lesson 2: Evaluate, Simplify, and Translate ExpressionsLearnPractice
  • Lesson 3: Solving Equations Using the Subtraction and Addition Properties of EqualityLearnPractice
  • Lesson 4: Find Multiples and FactorsLearnPractice
  • Lesson 5: Prime Factorization and the Least Common MultipleLearnPractice

Chapter 3: Integers

Chapter 4: Fractions

Chapter 5: Decimals

Chapter 6: Percents

Chapter 7: The Properties of Real Numbers

Chapter 8: Solving Linear Equations

  • Lesson 1: Solve Equations Using the Subtraction and Addition Properties of EqualityLearnPractice
  • Lesson 2: Solve Equations Using the Division and Multiplication Properties of EqualityLearnPractice
  • Lesson 3: Solve Equations with Variables and Constants on Both SidesLearnPractice
  • Lesson 4: Solve Equations with Fraction or Decimal CoefficientsLearnPractice

Chapter 9: Math Models and Geometry

  • Lesson 1: Use a Problem Solving StrategyLearnPractice
  • Lesson 2: Solve Money ApplicationsLearnPractice
  • Lesson 3: Use Properties of Angles, Triangles, and the Pythagorean TheoremLearnPractice
  • Lesson 4: Use Properties of Rectangles, Triangles, and TrapezoidsLearnPractice
  • Lesson 5: Solve Geometry Applications: Circles and Irregular FiguresLearnPractice
  • Lesson 6: Solve Geometry Applications: Volume and Surface AreaLearnPractice
  • Lesson 7: Solve a Formula for a Specific VariableLearnPractice

Chapter 10: Polynomials

Chapter 11: Graphs

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