Lesson plan

# 10. Create a real-life situation for an expression with parentheses (A)

teaches Common Core State Standards CCSS.Math.Content.5.OA.A.1 http://corestandards.org/Math/Content/5/OA/A/1
teaches Common Core State Standards CCSS.Math.Content.5.OA.A.2 http://corestandards.org/Math/Content/5/OA/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP2 http://corestandards.org/Math/Practice/MP2

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Lesson objective: Apply knowledge of how to create, interpret, and evaluate expressions with all four operations and parentheses in order to come up with a real-life situation for a numerical expression.

This lesson provides an opportunity for students to apply their knowledge and understanding of creating, evaluating, and interpreting expressions to a real-life situation. Students are asked to choose at least one of three expressions of varying difficulty and come up with a real-life situation that the expression could represent. Then, the student needs to evaluate the expression using the order of operations.

Key Concept students will use:

• we can use grouping symbols to represent different mathematical situations; these sometimes change the value of expressions and sometimes do not.

Skills students will use:

• evaluating numerical expressions using the order of operations
• interpreting the meaning of the calculations completed in an expression
• creating a real-life situation that is represented by an assigned expression

Students engage in Mathematical Practice 2 (reason abstractly and quantitatively) as they create a real-life situation for at least one of three expressions that are at three different levels of difficulty and then evaluate the expression(s) they chose.

Key vocabulary:

• calculate
• evaluate
• numerical expression
• represent

Special materials needed:

• highlighter, if desired, so students can highlight parts of the expressions as they evaluate them