Conquering 3-Digit Addition with Regrouping!

Mathematics Grades 4th Grade 3:19 Video
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Lesson Description

Learn how to confidently add 3-digit numbers using the regrouping method, just like the Numberockers!

Video Resource

Addition with Regrouping Song | 3-Digit Addition | 3rd-4th Grade

Math Songs by NUMBEROCK

Duration: 3:19
Watch on YouTube

Key Concepts

  • Place Value (ones, tens, hundreds)
  • Regrouping (carrying over to the next place value)
  • Addition with 3-digit numbers
  • Checking your work with Subtraction

Learning Objectives

  • Students will be able to add 3-digit numbers with regrouping accurately.
  • Students will be able to explain the concept of regrouping in their own words.
  • Students will be able to check their addition using subtraction.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what they already know about addition. Briefly review place value (ones, tens, hundreds) using base-ten blocks or drawings. Introduce the video and explain that it's a fun way to learn about addition with regrouping.
  • Watch the Video (5 mins)
    Play the "Addition with Regrouping Song" video by Numberock. Encourage students to sing along and pay attention to how the song explains the regrouping process.
  • Guided Practice (15 mins)
    Work through a few 3-digit addition problems on the board, modeling the regrouping process. Use the examples from the song (ants, hens) as a starting point. Emphasize the importance of starting with the ones place and regrouping when the sum is 10 or more. For example: 597 + 911 = ? 189 + 985 = ?
  • Independent Practice (15 mins)
    Provide students with worksheets or practice problems involving 3-digit addition with regrouping. Encourage them to use the strategies learned in the video and during guided practice. Circulate to provide support and answer questions. Include problems where students need to check their answers using subtraction.
  • Review and Wrap-up (5 mins)
    Review the key concepts of place value and regrouping. Ask students to share any challenges they faced and how they overcame them. Briefly introduce the idea of using subtraction to check addition, as mentioned in the video.

Interactive Exercises

  • Base-Ten Block Addition
    Provide students with base-ten blocks and have them model 3-digit addition problems. This allows them to physically see the regrouping process.
  • Number Line Addition
    Use a number line to visualize addition. Start at one addend and then 'jump' the amount of the other addend. This helps students understand the concept of adding as moving along a number sequence.

Discussion Questions

  • Why is it important to understand place value when adding with regrouping?
  • Can you explain in your own words what 'regrouping' means?
  • How can you check your answer when you're doing addition?
  • What is one thing that still confuses you about addition with regrouping?

Skills Developed

  • Addition with Regrouping
  • Problem-Solving
  • Critical Thinking
  • Checking Work
  • Attention to Detail

Multiple Choice Questions

Question 1:

What do you do when the sum of the digits in a place value column is 10 or more?

Correct Answer: Regroup (carry over) to the next place value column

Question 2:

In the number 528, what is the value of the digit 2?

Correct Answer: 20

Question 3:

What is the first step when adding two 3-digit numbers?

Correct Answer: Add the ones place

Question 4:

Which of these is an example of regrouping?

Correct Answer: Writing 12 as 1 ten and 2 ones

Question 5:

If you are adding 345 + 178, and the ones column adds up to 13, what do you do?

Correct Answer: Write 3 in the ones column and carry-over the 1 to the tens column

Question 6:

What operation is the inverse of addition?

Correct Answer: Subtraction

Question 7:

How can you use subtraction to check if your addition is correct?

Correct Answer: Subtract one of the addends from the sum. The answer should be the other addend.

Question 8:

Which of these numbers has a '0' in the tens place?

Correct Answer: 903

Question 9:

Which of the following represents the expanded form of 672?

Correct Answer: 600 + 70 + 2

Question 10:

When you carry a '1' to the next column in addition, what are you really carrying?

Correct Answer: Ten

Fill in the Blank Questions

Question 1:

When adding, we always start with the _______ place.

Correct Answer: ones

Question 2:

_______ is when we carry over a digit to the next place value column.

Correct Answer: Regrouping

Question 3:

In the number 739, the 7 represents _______ hundreds.

Correct Answer: seven

Question 4:

If the sum of the ones column is 15, you write 5 and carry-over the _______.

Correct Answer: 1

Question 5:

Understanding _______ _______ helps us to regroup correctly.

Correct Answer: place value

Question 6:

The inverse operation of addition is _______.

Correct Answer: subtraction

Question 7:

To check your addition, you can _______ one addend from the sum.

Correct Answer: subtract

Question 8:

500 + 30 + 8 is the _______ form of 538.

Correct Answer: expanded

Question 9:

If you have 10 tens, it's the same as _______ hundred.

Correct Answer: one

Question 10:

_______ to detail is very important when adding with regrouping.

Correct Answer: Attention

Educational Standards

4.N.2.4:Apply and analyze models to solve multi-step problems requiring the use of addition, subtraction, and multiplication of multi-digit whole numbers. Use various strategies, including the relationship between operations, the use of appropriate technology, and the context of the problem to assess the reasonableness of results. 4.N.1.2:Use place value to describe whole numbers between 1,000 and 1,000,000 in terms of millions, hundred thousands, ten thousands, thousands, hundreds, tens, and ones with written, standard, and expanded forms.

Teaching Materials

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