Common Core: 2nd Grade Math : Number & Operations in Base Ten

Study concepts, example questions & explanations for Common Core: 2nd Grade Math

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Example Questions

Example Question #1061 : Number & Operations In Base Ten

Solve:

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left. 

Let's look at the numbers in the ones place:

 

Next, we can subtract the numbers in the tens place:

Your final answer should be 

Example Question #1062 : Number & Operations In Base Ten

Solve:

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left. 

Let's look at the numbers in the ones place:

 

Next, we can subtract the numbers in the tens place:

Your final answer should be 

Example Question #1063 : Number & Operations In Base Ten

Solve:

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left. 

Let's look at the numbers in the ones place:

 

Next, we can subtract the numbers in the tens place:

Your final answer should be 

Example Question #1064 : Number & Operations In Base Ten

Solve the following:

Possible Answers:

Correct answer:

Explanation:

When we subtract multi-digit numbers, we start with the digits in the ones place and move to the left. 

Let's look at the numbers in the ones place:

When the top number is smaller than the bottom number, we have to borrow from the number to the left because we can't take  away from  since  is the smaller number. In this case, we are going to look to the . We only ever need to take  away from the number to the left. For this problem, that will leave us with a  to replace the . So far, your work should look something like this:

Remember, we've borrowed  from the tens place, and one ten is equal to . We now add that  to the digit in the ones place, . Your work should look something like this:

Now, we can subtract the numbers in the once place:

Next, we can subtract the numbers in the tens place:

Your final answer should be 

Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

3 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

3 3

Next, we add the numbers in the tens position, including the  that was carried over:

3 5

Let's add the digits in the tens place:

Your final answer should be 

3 4

Example Question #2 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

4 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

4 2

Next, we add the numbers in the tens position, including the  that was carried over:

4 3

Let's add the digits in the tens place:

Your final answer should be 

4 4

Example Question #3 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

7 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

7 2

Next, we add the numbers in the tens position, including the  that was carried over:

7 3

Let's add the digits in the tens place:

Your final answer should be 

7 4

Example Question #1 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

8 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

8 2

Next, we add the numbers in the tens position, including the  that was carried over:

8 3

Let's add the digits in the tens place:

Your final answer should be 

8 4

Example Question #5 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

5 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

5 2

Next, we add the numbers in the tens position, including the  that was carried over:

5 3

Let's add the digits in the tens place:

Your final answer should be 

5 4

Example Question #6 : Add Up To Four Two Digit Numbers: Ccss.Math.Content.2.Nbt.B.6

Solve:

Possible Answers:

Correct answer:

Explanation:

When we add with multi-digit numbers, we start with the numbers in the ones place, and then move to the left. 

6 1

Let's add the digits in the ones place:

Because the sum is greater than , we have to carry the  to the tens place. So far, your work should look like the following: 

6 2

Next, we add the numbers in the tens position, including the  that was carried over:

6 3

Let's add the digits in the tens place:

Your final answer should be 

6 4

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