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Lesson Plan

Solve percent problems using combinations of tax and tip

teaches Common Core State Standards CCSS.Math.Practice.MP1
teaches Common Core State Standards CCSS.Math.Content.7.EE.B.3
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Content.7.RP.A.3
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Big Ideas: A percent is another way to write a decimal or fraction that compares part to a whole where the whole is 100. Percent is relative to the size of the whole. In this task, students are combining their knowledge of percents with equation writing. Students are asked to analyze various equations, not for the computation of the final answer, but for how the equation is constructed to represent a tax and tip problem. They will determine equivalence of equations and observe incorrect thinking in equations. Students are also provided the opportunity to connect ideas of proportionality with percent. Special Materials: Calculators as needed
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