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Lesson Plan

6. Adding to find the sum of 10 ones and 1, 2, 3, 4, 5, 6, 7, 8, or 9 ones (A)

teaches Common Core State Standards CCSS.Math.Content.K.NBT.A.1 http://corestandards.org/Math/Content/K/NBT/A/1
teaches Common Core State Standards CCSS.Math.Practice.MP7 http://corestandards.org/Math/Practice/MP7
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Lesson objective: Apply their knowledge that the numbers 11-19 are the sum of 10 ones and 1, 2, 3, 4, 5, 6, 7, 8, or 9 ones.

This lesson provides an opportunity for students to apply their knowledge and understanding of numbers 11-19 to a mathematical situation. Students are asked to represent the numbers 11-19 in various representations which include: pictures, number bonds, and equations. 

Key Concept students will use: 

  • The numbers 11-19 are the sum of 10 ones and 1, 2, 3, 4, 5, 6, 7, 8, or 9 ones.

Skills students will use:

  • their knowledge that numbers 11-19 are composed of ten ones and one, two, three, four, five, six, seven, eight, or nine ones.
  • the concept that the concept that the numbers 11-19 are the sum of ten ones and some more ones. 

Students engage in Mathematical Practice 7 students look for and make use of structure as they represent teen numbers in various ways.

Key vocabulary: 

  • add
  • compose
  • decompose
  • equality
  • equation
  • number bond
  • sum

Special materials needed:

  • counters (optional)
  • My Teen Numbers book template
  • ten frames (optional)
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