Lesson plan

# 9. Use grouping symbols to make an equation true (FP)

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.Practice.MP6 http://corestandards.org/Math/Practice/MP6

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Lesson objective: Practice using parentheses to make an equation true.

This lesson helps to build fluency with using grouping symbols like parentheses in an equation to make it true and correctly represent a real-life or mathematical situation. Tables and highlighting are used here because they help students organize their thinking as they are working through the calculations. This work develops students' understanding that they can use grouping symbols to represent different mathematical situations; these sometimes change the value of expressions and sometimes do not.

Students engage in Mathematical Practice 6 (attend to precision) as they learn how the order of operations and parentheses can have an effect on the outcome of an expression or equation.

Key vocabulary:

• equation
• evaluate
• expression

Special materials needed:

• highlighter, if desired, for highlighting parts of equations that are being calculated