Lesson plan

6. Use common denominators to divide fractions (A)

teaches Common Core State Standards CCSS.Math.Content.6.NS.A.1 http://corestandards.org/Math/Content/6/NS/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3

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Lesson objective: Connect fraction division to make equal portions of snack mix with and without left over.

This lesson provides an opportunity for students to apply their knowledge and understanding of fraction division to a real-life situation. Students are asked to make recommendations for making equal portions of snack mix without knowing the exact number of portions, with and without left over.

Key Concept students will use:

• Measurement division extends to division with fractions, and may be done with common denominators.  The result names the number of groups.

Skills students will use:

• Dividing fractions using common denominators.
• Compute and interpret the quotient and remainder

Students engage in Mathematical Practice 3 (construct viable arguments and critique the reasoning of others) as they give recommendations for making equal portions of snack mix, with and without left over.

Key vocabulary:

• common denominator
• dividend
• divisor
• quotient
• remainder

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• 6. Use common denominators to divide fractions (A)