Lesson plan

6. Represent arrays using repeated addition (FP)

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teaches Common Core State Standards CCSS.Math.Content.2.OA.C.4 http://corestandards.org/Math/Content/2/OA/C/4
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Write repeated addition equations to represent arrays. 

This lesson helps to build procedural skills with writing repeated addition equations. Providing a number to create an array is used here because it supports writing the repeated addition equation that represents the array. This work develops students' understanding that skip counting or repeated addition can be used to find the total number of objects in an array because there is the same number of objects in every row or column.

Students engage in Mathematical Practice 2 (Reason abstractly and quantitatively). Students will make connections between equal groups of objects and arrays and the concept of adding equal addends.

Key vocabulary:

  • addends
  • addition
  • array
  • columns
  • equal
  • objects
  • repeated
  • rows
  • skip counting
  • total

Special materials needed:

  • Drawing Arrays Recording Sheet
  • Number Cards (1 page)
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