3-Digit Addition with Regrouping in Tens and Ones

## How to Add 3-Digit Numbers with Regrouping in Tens and Ones

So far, you've learned to add with regrouping in Ones and with regrouping in Tens

But can we do both in one addition problem?

Yes, we can!

Let's try to do that by adding these numbers:

166 + 265 = ?

👉 Let's expand the numbers to see the value of each digit.

166

166 is 1 Hundred, 6 Tens, and 6 Ones.

265

265 is 2 Hundreds, 6 Tens, and 5 Ones.

Write the numbers in column form before you start adding.

Where should we start?

👉 First, we add the Ones.

What is 6 + 5?

It's 11. This means we have 11 Ones.

Should we regroup?

Yes!

We regroup the Ones when the answer is more than 9, or if it has 2 digits.

We regroup 11 Ones by forming a Ten.

Now, we have 1 Ten and 1 One.

Add the 1 Ten to the Tens column.

Write 1 in the Ones place.

👉 Remember, you added 1 more Ten to the Tens place when you regrouped the Ones. You need to also add that.

Let's add 1 + 6 + 6.

What is the sum?

It's 13.

Should we regroup?

Of course!

We regroup the Tens when the answer we get is more than 9, or has 2 digits.

Let's regroup 13 Tens by forming a Hundred.

Now, we have 1 Hundred and 3 Tens.

Write 3 in the Tens place, and carry the 1 Hundred to the Hundreds place.

👉 Don't forget to add the 1 Hundred that we got from regrouping the Tens.

Can you add 1 + 1 + 2?

It's 4! We have 4 Hundreds.

Write 4 in the Hundreds place.

So, 166 + 265 equals 431.

### Watch and Learn

Great job! 🎉

Now, you can move on to practice.

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The passage provides a detailed explanation of how to add two 3-digit numbers with regrouping in both the Tens and Ones places, and it includes a specific example with a step-by-step solution.
single_question_with_answer
Given a text passage, determine:
    1. If it contains a mathematical question (including word problems or calculations)
    2. If an answer to that mathematical question is provided in the text

First, describe the content structure you found in 1-2 sentences.

Then provide your analysis in the following format:
TYPE: <one of the following values>
- NO_QUESTION
- SINGLE_QUESTION
- SINGLE_QUESTION_WITH_ANSWER
- MULTIPLE_QUESTIONS
- MULTIPLE_QUESTIONS_WITH_ANSWERS
system
3-Digit Addition with Regrouping in Tens and Ones

## How to Add 3-Digit Numbers with Regrouping in Tens and Ones

So far, you've learned to add with regrouping in Ones and with regrouping in Tens

But can we do both in one addition problem?

Yes, we can!

Let's try to do that by adding these numbers:

166 + 265 = ?

👉 Let's expand the numbers to see the value of each digit.

166

166 is 1 Hundred, 6 Tens, and 6 Ones.

265

265 is 2 Hundreds, 6 Tens, and 5 Ones.

Write the numbers in column form before you start adding.

Where should we start?

👉 First, we add the Ones.

What is 6 + 5?

It's 11. This means we have 11 Ones.

Should we regroup?

Yes!

We regroup the Ones when the answer is more than 9, or if it has 2 digits.

We regroup 11 Ones by forming a Ten.

Now, we have 1 Ten and 1 One.

Add the 1 Ten to the Tens column.

Write 1 in the Ones place.

👉 Remember, you added 1 more Ten to the Tens place when you regrouped the Ones. You need to also add that.

Let's add 1 + 6 + 6.

What is the sum?

It's 13.

Should we regroup?

Of course!

We regroup the Tens when the answer we get is more than 9, or has 2 digits.

Let's regroup 13 Tens by forming a Hundred.

Now, we have 1 Hundred and 3 Tens.

Write 3 in the Tens place, and carry the 1 Hundred to the Hundreds place.

👉 Don't forget to add the 1 Hundred that we got from regrouping the Tens.

Can you add 1 + 1 + 2?

It's 4! We have 4 Hundreds.

Write 4 in the Hundreds place.

So, 166 + 265 equals 431.

### Watch and Learn

Great job! 🎉

Now, you can move on to practice.

# Our self-paced K6 learning platform was built with kids in mind, but parents and teachers love it too.

### Start a 7 day free trial.

Save an extra 10% off with code LEARN10

### Monthly

Full Access

\$6.99/mo.
7 day free trial
Unlimited learning
Cancel any time

### Yearly

Save 52% Off

\$83.88/yr.
\$39.99/yr.
7 day free trial
Unlimited learning
Cancel any time
30-day money-back guarantee
Our mission is to create the world’s most effective learning platform, so children of all learning abilities and backgrounds can develop to their greatest potential.
We offer affordable, effective Common Core learning plans for districts.
user
The passage provides a detailed explanation of how to add two 3-digit numbers with regrouping in both the Tens and Ones places, and it includes a specific example with a step-by-step solution.

TYPE: SINGLE_QUESTION_WITH_ANSWER