Tens and Ones: Discovering 11 and 12!

Math Grades 1st Grade 8:07 Video
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Lesson Description

Let's learn about the numbers 11 and 12 by understanding how they are made up of tens and ones! We'll use crayons, flowers, and beads to explore this!

Video Resource

Learn Grade 1 - Maths - Introducing 11 and 12 as tens and units

KidsClassroom - Nursery Rhymes & Kids Songs

Duration: 8:07
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Key Concepts

  • Understanding that numbers 11 and 12 are made of tens and ones.
  • Recognizing a group of ten as 'one ten'.
  • Decomposing numbers into tens and ones.

Learning Objectives

  • Students will be able to identify that 11 is composed of one ten and one one.
  • Students will be able to identify that 12 is composed of one ten and two ones.
  • Students will be able to represent numbers 11 and 12 using objects (crayons, beads, etc.).

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students if they know how to count to 12. Show them different sets of objects like pencils or blocks. Ask them to count each set and explain that today we are going to be learning how the numbers 11 and 12 are made.
  • Video Viewing (5 mins)
    Play the 'Learn Grade 1 - Maths - Introducing 11 and 12 as tens and units' video. Encourage students to pay attention to how the video uses crayons, flowers, and beads to explain tens and ones.
  • Discussion (5 mins)
    After the video, discuss what they saw. Ask questions like: 'What did the video use to show 10?' 'How many crayons were in one group of ten?' 'How many crayons were left over when they showed 11?' 'How many flowers were there in total when they showed 12?'
  • Activity: Building 11 and 12 (10 mins)
    Give each student a set of manipulatives (e.g., small blocks, counters). Have them create a group of ten and then add one more to make 11. Then, have them create a group of ten and add two more to make 12. Have them explain how many tens and how many ones are in each number.
  • Worksheet Practice (10 mins)
    Distribute a worksheet with pictures of groups of objects. Students will fill in the blanks to show how many tens and how many ones make up each number (11 and 12). Example: 11 = ____ ten and ____ one.

Interactive Exercises

  • Counting Station
    Set up a station with various objects (e.g., beans, buttons). Students count out 11 or 12 objects and then group them into a ten and leftover ones.
  • Number Representation
    Use a whiteboard or large paper. Write the numbers 11 and 12. Have students draw pictures of tens and ones to represent each number.

Discussion Questions

  • What does 'tens' mean?
  • What does 'ones' mean?
  • Can you give me another example of something you can group into tens?

Skills Developed

  • Number sense
  • Place value understanding
  • Counting skills
  • Addition

Multiple Choice Questions

Question 1:

How many TENS are in the number 11?

Correct Answer: 1

Question 2:

How many ONES are in the number 11?

Correct Answer: 1

Question 3:

How many TENS are in the number 12?

Correct Answer: 1

Question 4:

How many ONES are in the number 12?

Correct Answer: 2

Question 5:

Which of these shows 11?

Correct Answer: 1 ten and 1 one

Question 6:

Which of these shows 12?

Correct Answer: 1 ten and 2 ones

Question 7:

What is bigger? 11 or 12?

Correct Answer: 12

Question 8:

If you have 10 crayons and someone gives you 1 more, how many crayons do you have?

Correct Answer: 11

Question 9:

If you have 10 beads and someone gives you 2 more, how many beads do you have?

Correct Answer: 12

Question 10:

Ten is the same as...

Correct Answer: 1 ten

Fill in the Blank Questions

Question 1:

The number 11 has 1 _____ and 1 one.

Correct Answer: ten

Question 2:

The number 12 has 1 ten and _____ ones.

Correct Answer: 2

Question 3:

10 crayons make 1 _____ of crayons.

Correct Answer: group

Question 4:

1 ten and 1 one makes the number _____

Correct Answer: 11

Question 5:

1 ten and 2 ones makes the number _____

Correct Answer: 12

Question 6:

11 is more than _____

Correct Answer: 10

Question 7:

_____ is one more than 11

Correct Answer: 12

Question 8:

In the number 11, the 1 on the left means 1 _____.

Correct Answer: ten

Question 9:

In the number 12, the 2 means 2 _____

Correct Answer: ones

Question 10:

If I have 10 stickers and you give me 2 stickers I will have _____ stickers

Correct Answer: 12

Educational Standards

CCSS.Math.Content.1.NBT.B.2.B:The numbers from 11 to 19 are composed of a ten and one, two, three, four, five, six, seven, eight, or nine ones. CCSS.Math.Content.1.NBT.B.2:Understand that the two digits of a two-digit number represent amounts of tens and ones. CCSS.Math.Content.1.OA.A.1:Use addition and subtraction within 20 to solve word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using objects, drawings, and equations with a symbol for the unknown number to represent the problem.

Teaching Materials

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