Common Core: 1st Grade Math : Add and Subtract 10 to Two-Digit Numbers: CCSS.MATH.CONTENT.1.NBT.C.5

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

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Example Questions

Example Question #31 : Place Value And Properties Of Operations To Add And Subtract

 

Possible Answers:

Correct answer:

Explanation:

When we add  to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add  to the number in the tens place to find our answer. 

Example Question #1324 : How To Add

 

Possible Answers:

Correct answer:

Explanation:

When we add  to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add  to the number in the tens place to find our answer. 

Example Question #1325 : How To Add

 

Possible Answers:

Correct answer:

Explanation:

When we add  to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add  to the number in the tens place to find our answer. 

Example Question #32 : Place Value And Properties Of Operations To Add And Subtract

 

Possible Answers:

Correct answer:

Explanation:

When we add  to a two digit number, the only number that changes in our answer is the tens position, and it will always go up by . Mentally, we can add  to the number in the tens place to find our answer. 

Example Question #962 : Numbers And Operations

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

Example Question #963 : Numbers And Operations

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

Example Question #964 : Numbers And Operations

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

Example Question #965 : Numbers And Operations

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

Example Question #751 : How To Subtract

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

Example Question #752 : How To Subtract

 

Possible Answers:

Correct answer:

Explanation:

When we subtract  from a two digit number, the only number that changes in our answer is the tens position, and it will always go down by . Mentally, we can subtract  from the number in the tens place to find our answer. 

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