Lesson plan

# 3. Order of factors (A)

teaches Common Core State Standards CCSS.Math.Content.3.OA.B.5 http://corestandards.org/Math/Content/3/OA/B/5
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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Lesson objective: Solve problems using the commutative property.

This lesson provides an opportunity for students to apply their knowledge and understanding of the commutative property to a real-life situation. Students are asked to determine how many containers would be needed for Oliver to put away his buiding blocks for two different sized containers.

Key Concept students will use:

• A given set of factors has the same product, regardless of the order in which the factors are written.

Skills students will use:

• Multiplication
• Repeated addition using the number line
• Using the commutative property

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they use the number line and commutative property to solve a real-world problem.

Key vocabulary:

• equation
• factor
• multiplication
• number line
• product
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• 3. Order of factors (A)