Lesson plan

3. Add and subtract lengths using a number line (C)

teaches Common Core State Standards CCSS.Math.Content.2.MD.B.5 http://corestandards.org/Math/Content/2/MD/B/5
teaches Common Core State Standards CCSS.Math.Practice.MP5 http://corestandards.org/Math/Practice/MP5
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7

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