Lesson plan

9. Practice scaling using estimating, and then calculating (FP)

  • From K-5 Math Companion Curriculum
  • Created by
  • Standards
  • Tags:
teaches Common Core State Standards 5.NF.B.5 http://corestandards.org/Math/Content/5/NF/B/5
teaches Common Core State Standards 5.NF.B.5.a http://corestandards.org/Math/Content/5/NF/B/5/a
teaches Common Core State Standards 5.NF.B.5.b http://corestandards.org/Math/Content/5/NF/B/5/b
teaches Common Core State Standards 5.NF.B.6 http://corestandards.org/Math/Content/5/NF/B/6
teaches Common Core State Standards MP2 http://corestandards.org/Math/Practice/MP2
teaches Common Core State Standards MP4 http://corestandards.org/Math/Practice/MP4
teaches Common Core State Standards MP6 http://corestandards.org/Math/Practice/MP6
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Lesson objective: Multiply fractions and mixed numbers to scale numbers up and down.

This lesson helps to build fluency with multiplication of fractions and mixed numbers. Equivalent fractions are used here because it supports multiplication of mixed numbers to solve real-world problems. This work develops students' understanding that scaling with positive, non-whole numbers has the same meaning as scaling with whole numbers.

Students engage in Mathematical Practice 6 (attend to precision) as they multiply fractions and mixed numbers to solve real-world problems. 

Key vocabulary:

  • scaling