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Lesson Plan

Compare an algebraic solution to an arithmetic solution by identifying the sequence of operations used in each approach

teaches Common Core State Standards CCSS.Math.Content.7.EE.B.4a
teaches Common Core State Standards CCSS.Math.Content.7.EE.B.4b
teaches Common Core State Standards CCSS.Math.Practice.MP2
teaches Common Core State Standards CCSS.Math.Practice.MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7
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Big Ideas: Many problems can be solved arithmetically or algebraically. An algebraic solution is simply a generalized arithmetic solution. This lesson builds on students' knowledge of solving real-world word problems with arithmetic, and writing and solving two-step equations. The task asks students to consider a statement about the size of a train set, evaluate it both arithmetically and algebraically, and then compare the two approaches. This builds toward students' future work in fluently solving real-world problems by choosing an appropriate strategy, as well as solving two-step inequalities, in grades 7 and 8. Vocabulary: algebraic solution, arithmetic solution Special Materials: none
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