Two-Digit Number Explorers!

Math Grades 1st Grade 5:19 Video
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Lesson Description

Let's learn about two-digit numbers and how they show us how many tens and ones we have!

Video Resource

Learn Grade 1 - Maths - Two Digits Numerals

KidsClassroom - Nursery Rhymes & Kids Songs

Duration: 5:19
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Key Concepts

  • Tens place
  • Ones place
  • Two-digit numbers

Learning Objectives

  • Students will be able to identify the tens and ones place in a two-digit number.
  • Students will be able to represent a two-digit number using tens and ones.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students what numbers they already know. Review counting to 20. Introduce the idea that numbers bigger than 9 need two digits to be written.
  • Video Viewing (5 mins)
    Watch the video 'Learn Grade 1 - Maths - Two Digits Numerals' (https://www.youtube.com/watch?v=hDN2Wvp7JE4). Focus on how the video shows tens and ones.
  • Tens and Ones Exploration (15 mins)
    Use base-ten blocks (or drawings) to represent different two-digit numbers. Have students identify how many 'tens' and how many 'ones' are in each number. For example, show the number 23. Ask: 'How many groups of ten are there?' (2) 'How many single ones are there?' (3)
  • Practice Time (10 mins)
    Give each student a worksheet with two-digit numbers. Ask them to circle the tens place and underline the ones place. They can also draw the number using tens and ones blocks.
  • Wrap Up (5 mins)
    Review what was learnt in the video. Quickly review the questions in the Discussion Questions section.

Interactive Exercises

  • Number Building Game
    Call out a two-digit number. Students use base-ten blocks (or drawings) to quickly build that number. Check their work to reinforce understanding.

Discussion Questions

  • What is the biggest one-digit number?
  • What happens when we add one more to 9?
  • What does the 'tens' place tell us?
  • What does the 'ones' place tell us?

Skills Developed

  • Place value understanding
  • Number recognition
  • Visual representation of numbers

Multiple Choice Questions

Question 1:

Which number is in the tens place in 35?

Correct Answer: 3

Question 2:

Which number is in the ones place in 12?

Correct Answer: 2

Question 3:

How many tens are in the number 40?

Correct Answer: 4

Question 4:

Which of these numbers has 2 in the ones place?

Correct Answer: 12

Question 5:

What does the number 10 mean?

Correct Answer: Ten ones

Question 6:

If you have 2 tens and 5 ones, what number do you have?

Correct Answer: 25

Question 7:

Which number has 3 tens and 0 ones?

Correct Answer: 30

Question 8:

What is the value of the 7 in the number 71?

Correct Answer: 7 tens

Question 9:

Which of these is NOT a two-digit number?

Correct Answer: 5

Question 10:

In the number 68, which number shows how many groups of ten there are?

Correct Answer: 6

Fill in the Blank Questions

Question 1:

The number 23 has 2 _______ and 3 ones.

Correct Answer: tens

Question 2:

In the number 47, the 7 is in the _______ place.

Correct Answer: ones

Question 3:

The number 10 is made of one _______.

Correct Answer: ten

Question 4:

The number 50 has 5 _______ and 0 ones.

Correct Answer: tens

Question 5:

In the number 82, the 8 is in the _______ place.

Correct Answer: tens

Question 6:

The number 15 has 1 ten and 5 _______.

Correct Answer: ones

Question 7:

If a number has 6 in the tens place, it means there are 6 groups of _______.

Correct Answer: ten

Question 8:

The number 99 has 9 tens and 9 _______.

Correct Answer: ones

Question 9:

The _______ place tells us how many groups of ten are in a number.

Correct Answer: tens

Question 10:

Numbers like 10, 20, 30, 40, 50, 60, 70, 80, and 90 only have _______ .

Correct Answer: tens

Educational Standards

CCSS.Math.Content.1.NBT.B.2:Understand that the two digits of a two-digit number represent amounts of tens and ones. Understand the following as special cases: CCSS.Math.Content.1.NBT.A.1:Count to 120, starting at any number less than 120. In this range, read and write numerals and represent a number of objects with a written numeral.

Teaching Materials

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