Number Train Adventure: Finding the Missing Number!

Math Grades 1st Grade 2:54 Video
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Lesson Description

Join us on a fun number train adventure where we learn to find the missing number in a sequence from 1 to 100! We'll use our counting skills and problem-solving abilities to become number detectives!

Video Resource

What's the Missing Number [1-100 Version] (Can you figure out the MISSING number?)

Harry Kindergarten Music

Duration: 2:54
Watch on YouTube

Key Concepts

  • Number Sequencing
  • Counting Forward
  • Identifying Missing Numbers

Learning Objectives

  • Students will be able to identify the missing number in a sequence of 3-5 numbers within the range of 1-100.
  • Students will be able to explain their reasoning for choosing the missing number.

Educator Instructions

  • Introduction (5 mins)
    Begin by asking students if they have ever played a number game or found something that was missing. Introduce the concept of a 'number train' and explain that some of the numbers are missing. Tell them they will become number detectives to find the missing numbers.
  • Video Time (5 mins)
    Play the 'What's the Missing Number' video by Harry Kindergarten Music. Encourage students to sing along and try to identify the missing numbers as they appear on the screen.
  • Guided Practice (10 mins)
    After the video, write a few number sequences on the board (e.g., 12, 13, __, 15, 16 or 45, __, 47, 48). Guide students through identifying the missing number in each sequence. Ask them to explain how they figured out the answer.
  • Independent Practice (10 mins)
    Provide students with a worksheet or a whiteboard with pre-written number sequences with missing numbers. Have them independently fill in the missing numbers. Circulate to provide support as needed.
  • Wrap-up (5 mins)
    Review the answers to the independent practice. Discuss any challenges students faced and reinforce the concept of number sequencing. Play the video again as a fun review.

Interactive Exercises

  • Number Line Game
    Create a large number line on the floor using tape or chalk. Call out a number sequence with a missing number and have a student jump to the correct missing number on the number line.
  • Missing Number Cards
    Create flashcards with number sequences and a blank space for the missing number. Show the cards to the students and have them write down the missing number on a whiteboard or piece of paper.

Discussion Questions

  • What strategies did you use to find the missing number?
  • How does knowing the number that comes before and after help you find the missing number?
  • Can you think of a time when you used numbers in a sequence in your everyday life?

Skills Developed

  • Number Recognition
  • Counting Skills
  • Problem-Solving
  • Logical Reasoning

Multiple Choice Questions

Question 1:

What number comes after 5?

Correct Answer: 6

Question 2:

What number is missing: 10, 11, __, 13, 14?

Correct Answer: 12

Question 3:

Which number comes before 20?

Correct Answer: 19

Question 4:

What number is missing: 32, 33, 34, __, 36?

Correct Answer: 35

Question 5:

What number is right after 49?

Correct Answer: 50

Question 6:

What number is missing: 67, __, 69, 70, 71?

Correct Answer: 68

Question 7:

Which number comes before 82?

Correct Answer: 81

Question 8:

What number is missing: 90, 91, __, 93, 94?

Correct Answer: 92

Question 9:

What number comes after 98?

Correct Answer: 99

Question 10:

What number is missing: 2, __, 4, 5, 6?

Correct Answer: 3

Fill in the Blank Questions

Question 1:

The number after 7 is ____.

Correct Answer: 8

Question 2:

15, 16, ____, 18, 19. The missing number is ____.

Correct Answer: 17

Question 3:

The number before 25 is ____.

Correct Answer: 24

Question 4:

30, 31, 32, ____, 34. The missing number is ____.

Correct Answer: 33

Question 5:

The number after 44 is ____.

Correct Answer: 45

Question 6:

55, ____, 57, 58, 59. The missing number is ____.

Correct Answer: 56

Question 7:

The number before 60 is ____.

Correct Answer: 59

Question 8:

71, 72, ____, 74, 75. The missing number is ____.

Correct Answer: 73

Question 9:

The number after 89 is ____.

Correct Answer: 90

Question 10:

96, ____, 98, 99, 100. The missing number is ____.

Correct Answer: 97

Educational Standards

CCSS.Math.Content.1.OA.D.8:Determine the unknown whole number in an addition or subtraction equation relating three whole numbers. For example, determine the unknown number that makes the equation true in each of the equations 8 + ? = 11, 5 = _ - 3, 6 + 6 = _. 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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