"Add to" Situations Unknowns in All Positions (Grade 1)

"Add to" Situations Unknowns in All Positions (Grade 1)

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Through engaging in the lessons in this lesson set, students will:  

  • solve tasks with “add to” situations using a variety of strategies and part-part-whole maps;  
  • determine if the “unknown” in a situation represents a part of the situation or the whole amount in a situation;  
  • apply and discuss the commutative property of addition;  
  • utilize subtraction to solve unknown-addend problems; and  
  • use the part-part-whole map to respond to problems with situations. 

Standards: 1.OA.A.1, 1.OA.A.2, 1.OA.B.3, 1.OA.B.4 


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