Lesson 7

Multiply Fractions by a Whole

Est. Class Sessions: 2
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Mathematical Standards

5.NF.A
Use equivalent fractions as a strategy to add and subtract fractions. (5.NF.A.1, 5.NF.A.2)
5.NF.B
Apply and extend previous understandings of multiplication and division. (5.NF.B.4, 5.NF.B.6, 5.NF.B.7)

Standards for Mathematical Practice

MP1.
Make sense of problems and persevere in solving them.
MP2.
Reason quantitatively.
MP3.
Construct viable arguments and critique the reasoning of others.
MP4.
Model with mathematics.
MP5.
Use appropriate tools strategically.
MP6.
Attend to precision.
MP7.
Look for and make use of structure.

Students read “Peanut Soup,” a story about George Washington Carver and his students planning a luncheon in which they use fractions to convert recipes to the needed size. Students use a variety of strategies and representations to multiply fractions by whole numbers.

Content in this Lesson

  • Representing multiplication of fractions by whole numbers with area models, number lines, number sentences, and drawings [E3].
  • Multiplying fractions by whole numbers using area models, drawings, and number lines [E4].
  • Solving word problems involving multiplication of fractions by wholes [E5].
  • Explaining the effects of factors less than and greater than 1 on the product of fractions [E6].
  • Representing the simplest form of a fraction [E2].
  • Finding a strategy with which to multiply fractions by whole numbers [MPE2].
  • Solving a problem more than one way to check calculations [MPE4].
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Materials for Students

Daily Practice and Problems Lesson Homework Assessment

Student Books

 Student Guide
Student Activity Book

Teacher Resources

 Teacher Guide - digital

Supplies for Students

  • fraction circle pieces

Materials for the Teacher

Assessment in this Lesson

Assessment Expectation Assessed Math Practices Expectation Assessed

Turkey and Potatoes
with Feedback Box
Teacher Guide - digital
E2.
Represent and identify the simplest form of a fraction using tools (e.g., area models) and multiplication and division strategies.
E3.
Represent addition, subtraction, multiplication, and division of fractions with area models, number lines, number sentences, drawings, and stories.
E4.
Multiply and divide fractions using area models, drawings, and number lines.
E5.
Solve word problems involving addition, subtraction, and multiplication of fractions.
MPE2.
Find a strategy. I choose good tools and an efficient strategy for solving the problem.
MPE4.
Check my calculations. If I make mistakes, I correct them.
MPE5.
Show my work. I show or tell how I arrived at my answer so someone else can understand my thinking.