Description
Students had their first experience creating and using a ruler as a number line in Topic A. Now, in Lesson 8, students solve addition and subtraction word problems using the ruler as a number line. This concept is reinforced and practiced throughout the module in fluency activities that involve using the meter strip for counting on and counting back and is incorporated into the accompanying Problem Sets. In Lesson 9, students progress from concrete to abstract by creating tape diagrams to represent and compare lengths. Lesson 10 culminates with students solving two-step word problems involving measurement using like units.
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Credits
From EngageNY.org of the New York State Education Department. Grade 2 Mathematics Module 2, Topic D.
Available from engageny.org/resource/grade-2-mathematics-module-2-topic-d; accessed 2015-05-29.
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