Number Grid Adventures: Finding Missing Numbers!

Math Grades 1st Grade 3:52 Video
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Lesson Description

Join Sal and Esther as they explore number grids and learn how to find the missing numbers. Learn to count forward, backward, and even up and down to complete the grid!

Video Resource

Ben Eater eats the numbers | Counting | Early Math | Khan Academy

Khan Academy

Duration: 3:52
Watch on YouTube

Key Concepts

  • Counting sequence
  • Number patterns
  • Using preceding and succeeding numbers to identify missing numbers

Learning Objectives

  • Students will be able to identify missing numbers in a number grid.
  • Students will be able to use the numbers before and after a missing number to determine its value.
  • Students will be able to count forward and backward to complete a number sequence.

Educator Instructions

  • Introduction (5 mins)
    Begin by introducing the video, 'Ben Eater eats the numbers | Counting | Early Math | Khan Academy.' Briefly explain that the video will teach them how to find missing numbers on a number grid, just like detectives!
  • Watch the Video (7 mins)
    Play the video. Encourage students to pay close attention to how Sal and Esther find the missing numbers. Point out the strategies they use (looking at the number before, the number after, and counting up and down).
  • Guided Practice (10 mins)
    After the video, work through some example number grids together on the board. Start with simple grids and gradually increase the difficulty. Ask questions like, 'What number comes before 5?' or 'What number comes after 12?' Guide students to use counting strategies.
  • Independent Practice (10 mins)
    Give students individual number grid worksheets with missing numbers. Have them work independently to fill in the missing numbers. Circulate to provide support and answer questions.
  • Wrap-up (3 mins)
    Review the key concepts and strategies learned in the lesson. Ask students to share their favorite strategy for finding missing numbers. Celebrate their success!

Interactive Exercises

  • Number Grid Game
    Create a large number grid on the floor using tape. Have students take turns being 'Ben Eater' and removing numbers. The other students must then work together to identify the missing numbers and replace them.
  • Missing Number Flashcards
    Create flashcards with number sequences and a missing number. Show the flashcards to the class and have them call out the missing number. Increase the difficulty by including larger numbers or more missing numbers.

Discussion Questions

  • What strategies did Sal and Esther use to find the missing numbers?
  • How can counting help us find missing numbers?
  • Can you think of a time when you've used counting in real life?

Skills Developed

  • Counting skills
  • Number recognition
  • Problem-solving
  • Pattern recognition

Multiple Choice Questions

Question 1:

What number comes after 7?

Correct Answer: 8

Question 2:

What number comes before 12?

Correct Answer: 11

Question 3:

Which number is missing: 3, 4, __, 6?

Correct Answer: 5

Question 4:

What is the number before 20?

Correct Answer: 19

Question 5:

Which number is missing: 11, 12, 13, __?

Correct Answer: 14

Question 6:

What number is one more than 5?

Correct Answer: 6

Question 7:

What number is one less than 9?

Correct Answer: 8

Question 8:

What number comes before 15?

Correct Answer: 14

Question 9:

Which number is missing: 21, __, 23, 24?

Correct Answer: 22

Question 10:

What number comes after 32?

Correct Answer: 33

Fill in the Blank Questions

Question 1:

The number after 10 is ____.

Correct Answer: 11

Question 2:

The number before 5 is ____.

Correct Answer: 4

Question 3:

6, 7, ____, 9. The missing number is ____.

Correct Answer: 8

Question 4:

15, 16, ____. The next number is ____.

Correct Answer: 17

Question 5:

____, 22, 23. The missing number is ____.

Correct Answer: 21

Question 6:

One more than 8 is ____.

Correct Answer: 9

Question 7:

One less than 12 is ____.

Correct Answer: 11

Question 8:

The number that comes before 30 is ____.

Correct Answer: 29

Question 9:

28, 29, ____. The missing number is ____.

Correct Answer: 30

Question 10:

____, 36, 37. The missing number is ____.

Correct Answer: 35

Educational Standards

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. CCSS.Math.Content.1.OA.C.5:Relate counting to addition and subtraction (e.g., by counting on 2 to add 2).

Teaching Materials

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