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Lesson Plan

7. Using multiplication and division to solve word problems involving measurement (l, g, kg) (C)

teaches Common Core State Standards CCSS.Math.Practice.MP1 http://corestandards.org/Math/Practice/MP1
teaches Common Core State Standards CCSS.Math.Content.3.MD.A.2 http://corestandards.org/Math/Content/3/MD/A/2
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
teaches Common Core State Standards CCSS.Math.Content.3.OA.A.3 http://corestandards.org/Math/Content/3/OA/A/3
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Lesson objective: Understand that multiplication and division can be used to solve problems, which include putting measurements into equal groups and putting equal groups of measurements together. This will extend the students' thinking about multiplication and division.

Students have prior knowledge of multiplication and division from 3.OA.A.3.  They extend their understanding to work with measurement values (grams, kilograms, and liters) as students multiply and divide liters, grams, and kilograms. A conceptual challenge students may encounter is not thinking about numbers as representing a quantity of liters, grams, or kilograms.  

The concept is developed through work with pictures which helps students visualize the task. 

This work helps students deepen their understanding that equivalent numerical expressions can be written using multiplication or division.

Students engage in Mathematical Practice 7 (Look for and make use of structure) as they represent tasks using both multiplication and division. 

Key vocabulary:

  • commutative property of mutliplication
  • division
  • equal groups
  • multiplication
  • number line
  • tape diagram

 

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Using multiplication and division to solve measurement problems

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