Common Core: 1st Grade Math : Understanding and Applying Properties of Operations and the Relationship between Addition and Subtraction

Study concepts, example questions & explanations for Common Core: 1st Grade Math

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Example Questions

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Example Question #51 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get to  

Possible Answers:

Correct answer:

Explanation:

 or as a subtraction problem, .

Example Question #52 : Use The Unknown Addend To Subtract: Ccss.Math.Content.1.Oa.B.4

What can we add to  to get 

Possible Answers:

Correct answer:

Explanation:

 or as a subtraction problem, .

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