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Lesson Plan

C_Understand multiples and factors

teaches Common Core State Standards CCSS.Math.Practice.MP3 http://corestandards.org/Math/Practice/MP3
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
teaches Common Core State Standards CCSS.Math.Content.4.OA.B.4 http://corestandards.org/Math/Content/4/OA/B/4
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Lesson objective: Understand that a whole number is a multiple of its factors.

Students bring prior knowledge of using multiplication and division to solve word problems from 3.OA.A.3. This prior knowledge is extended to factors and multiples as students determine relationships between whole numbers. A conceptual challenge students may encounter is the connection of factors to multiples. For example, students will need to understand that many factors share the same multiple, but will not have all of the same multiples.

​The concept is developed through work with area models, which relate multiples and factors to work in third grade with area models and arrays. Students also work with t-charts, which provide an organized way to determine factors of a whole number.

This work helps students deepen their understanding of equivalence because multiples are equal to the product of their factor pairs.

Students engage in Mathematical Practice 7 (look for and make use of structure) as they begin to notice the pattern of multiples and the relationship between factors and multiples.

Key vocabulary:

  • factors
  • multiples

 

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