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FLORIDA Pre-Algebra Teacher’s Guide Vol. A

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Use this guide to accompany Lesson 2.05, Semester A. Simplify Before Multiplying or Dividing LESSON GOALS • Combine like terms to solve multiplication or division equations. • Apply the distributive property to solve multiplication or division equations. 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. PACING One class period, approximately 60 minutes LEARN MATHCAST: SIMPLIFY BEFORE MULTIPLYING OR DIVIDING In this video, students are shown that it is easier to simplify things. As an analogy to simplifying equations, students see placing vitamins in peanut butter to simplify the process of giving the vitamins to dogs. Students are then shown how to combine like terms to solve the equation x + 4x = -25. KEYWORDS Students can preview definitions of keywords hyperlinked throughout the lesson. • distributive property • equivalent equations • inverse operations • like terms • properties of equality MATERIALS • Reference guide pages 62–64 • practice Activity Book pages 38–41 • Overview and Toolkit presentations SIMpLIFy BeFORe MuLTIpLyINg OR DIvIDINg 83

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