Adding Numbers by Making Groups of Ten!

Math Grades 1st Grade 3:35 Video
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Lesson Description

Let's learn how to add bigger numbers by breaking them apart and making groups of ten! This will help us add faster and easier.

Video Resource

Addition using groups of 10 intro | Addition and subtraction within 100 | Early Math | Khan Academy

Khan Academy

Duration: 3:35
Watch on YouTube

Key Concepts

  • Place Value (Tens and Ones)
  • Breaking apart numbers
  • Making groups of ten

Learning Objectives

  • Students will be able to break down two-digit numbers into tens and ones.
  • Students will be able to add a one-digit number to a two-digit number by making a group of ten.
  • Students will be able to rearrange numbers to make addition easier

Educator Instructions

  • Introduction (5 mins)
    Start by asking students what they already know about adding numbers. Review the concept of tens and ones using blocks or drawings. Show the YouTube video 'Addition using groups of 10 intro | Addition and subtraction within 100 | Early Math | Khan Academy'.
  • Guided Practice (10 mins)
    Work through the examples in the video together as a class. Pause the video at key points and ask students to explain what's happening in their own words. Emphasize how breaking down numbers and making tens simplifies the addition process.
  • Independent Practice (10 mins)
    Give students worksheets with similar addition problems. Encourage them to use the strategy of breaking down numbers and making tens to solve the problems. Circulate the room to provide support and answer questions.
  • Wrap-up (5 mins)
    Review the main concepts of the lesson. Ask students to share how they used the strategy of making tens to solve addition problems. Preview the next lesson on addition.

Interactive Exercises

  • Ten Frame Addition
    Use ten frames and counters to visually represent addition problems. Students can break down numbers and move counters to fill the ten frame, making it easier to see the total.
  • Number Bond Game
    Play a game where students create number bonds to break down numbers and make groups of ten. This helps them practice the strategy in a fun and engaging way.

Discussion Questions

  • Why is it helpful to break apart numbers when we add?
  • How does making a group of ten make adding easier?
  • Can you think of a time when you used this strategy outside of math class?

Skills Developed

  • Addition
  • Place Value
  • Problem-Solving
  • Critical Thinking

Multiple Choice Questions

Question 1:

What is 23 broken into tens and ones?

Correct Answer: 20 + 3

Question 2:

What is 10 + 5?

Correct Answer: 15

Question 3:

Which of these makes 10?

Correct Answer: 1 + 9

Question 4:

What is 30 + 7?

Correct Answer: 37

Question 5:

What two numbers are in 46?

Correct Answer: 40 + 6

Question 6:

Why do we break apart numbers?

Correct Answer: To make adding easier

Question 7:

What is 6 + 4?

Correct Answer: 10

Question 8:

Which of these is 54?

Correct Answer: 50 + 4

Question 9:

What is 20 + 10?

Correct Answer: 30

Question 10:

What is 83 broken into tens and ones?

Correct Answer: 80 + 3

Fill in the Blank Questions

Question 1:

53 is the same as 50 plus _____.

Correct Answer: 3

Question 2:

10 ones make one _____.

Correct Answer: ten

Question 3:

41 is the same as 40 + _____.

Correct Answer: 1

Question 4:

3 + 7 = _____.

Correct Answer: 10

Question 5:

5 tens is the same as _____.

Correct Answer: 50

Question 6:

We break numbers apart to make adding _____.

Correct Answer: easier

Question 7:

23 is the same as 20 plus _____.

Correct Answer: 3

Question 8:

5 + 5 = _____.

Correct Answer: 10

Question 9:

30 + 10 = _____.

Correct Answer: 40

Question 10:

We make _____ when adding

Correct Answer: ten

Educational Standards

1.NBT.C.4:Add within 100, including adding a two-digit number and a one-digit number, and adding a two-digit number and a multiple of 10, using concrete models or drawings and strategies based on place value, properties of operations, and/or the relationship between addition and subtraction; relate the strategy to a written method and explain the reasoning used. Understand that in adding two-digit numbers, one adds tens and tens, ones and ones; and sometimes it is necessary to compose a ten. 1.OA.B.3:Apply properties of operations as strategies to add and subtract. (Students need not use formal terms for these properties.) Examples: If 8 + 3 = 11 is known, then 3 + 8 = 11 is also known. (Commutative property of addition.) To add 2 + 6 + 4, the second two numbers can be added to make a ten, so 2 + 6 + 4 = 2 + 10 = 12. (Associative property of addition.) 1.NBT.B.2:Understand that the two digits of a two-digit number represent amounts of tens and ones.

Teaching Materials

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