FLORIDA Pre-Algebra Teacher’s Guide Vol. A

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Page 150 of 390

Use this guide to accompany Lesson 2.12, Semester A. Solve Problems with Equations LESSON GOALS • use the distributive property and collect like terms to simplify and solve linear equations. • use linear equations to solve real-world problems. FLORIDA STANDARDS • MAFS.8.EE.3.7b. Solve linear equations with rational number coefficients, including equations whose solutions require expanding expressions using the distributive property and collecting like terms. • LAFS.68.WHST.1.1e. Provide a concluding statement or section that follows from and supports the argument presented. PACING One class period, approximately 60 minutes CONTENT BACKGROUND In this lesson, students use a problem-solving plan that helps them write and solve equations with variables that model real-world problems. The five-step problem-solving plan gives students a way to organize their work and thinking process. While following the five-step plan, the student reads the problem and classifies the known and unknown information, identifies and defines the variable and variable expressions to represent the unknowns, writes an equation to model the problem, solves the equation, and checks the answer for reasonableness. It is important to note than there might be more than one way to solve an individual problem. The five-step process provides scaffolding into which all students can build their own understanding and meaning of individual problems. MATERIALS • reference Guide pages 88–90 • Practice activity Book pages 56–60 • overview and Toolkit presentations SoLve ProBLemS wITH equaTIonS 115

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