# 10. Solve problems using multiplication and division (A)

teaches Common Core State Standards CCSS.Math.Content.5.NBT.B.6 http://corestandards.org/Math/Content/5/NBT/B/6
teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1

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Lesson objective: Apply multiplication and division to solve a real-world problem.

This lesson provides an opportunity for students to apply their knowledge and understanding of multiplication and division to a real-life situation. Students are asked to determine the amount and cost of menu items for a district-wide math night based upon their calculated attendance and unit costs.

Key Concept students will use:

• Efficiently multiply using the standard algorithm
• Use division strategies to solve division problems

Skills students will use:

• the standard algorithm for multiplication
• rectangular array, area model, or partial quotients strategy for division

Students engage in Mathematical Practice 1 (Make sense of problems and persevere in solving them) as they determine the number of items needed for a math night and the total costs for the items.

Key vocabulary:

• division
• multiplication
• quotient
• product
• standard algorithm

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