Common Core: 1st Grade Math : Find the Missing Number in Addition and Subtraction Equations: CCSS.MATH.CONTENT.1.OA.D.8

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

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Example Questions

Example Question #51 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #631 : Operations & Algebraic Thinking

Fill in the blank. 

__________

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #51 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #54 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________

 

 

Possible Answers:

Correct answer:

Explanation:

 This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #55 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #56 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #57 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #58 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #59 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

Example Question #60 : Find The Missing Number In Addition And Subtraction Equations: Ccss.Math.Content.1.Oa.D.8

Fill in the blank. 

__________ 

 

 

Possible Answers:

Correct answer:

Explanation:

This question is asking what can we add to  to get to 

We can count up from  until we get to , and count the number of numbers we had to add after 

We have to add  numbers to get from  to 

Or we can subtract to find the missing number. 

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