Lesson plan

2. Practice dividing unit fractions by whole numbers (FP)

teaches Common Core State Standards CCSS.Math.Content.5.NF.B.7 http://corestandards.org/Math/Content/5/NF/B/7
teaches Common Core State Standards CCSS.Math.Content.5.NF.B.7a http://corestandards.org/Math/Content/5/NF/B/7/a
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5

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Lesson objective: Divide unit fractions by whole numbers using number lines and tape diagrams.

This lesson helps to build procedural skill with division including a unit fraction as the dividend and a whole number as the divisor. Number lines and tape diagrams are used here because they highlight the division of a unit fraction into equal parts while maintaining equal parts in the whole. This work develops students' understanding that the meaning of division does not change when the dividend is a unit fraction.

Students engage in Mathematical Practice 5 (use appropriate tools strategically) as they represent the original fraction, the number of parts the quantity is divided into, and the number of those parts it would take to make a whole. 

Key vocabulary:

  • dividend
  • divisor
  • quotient