New
New
Year 1

Finding the missing numbers

You can work out what the missing number is on a number track or number line.

New
New
Year 1

Finding the missing numbers

You can work out what the missing number is on a number track or number line.

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Lesson details

Key learning points

  1. Secure knowledge and recognition of the digits 0-10 to work out missing numbers on both number track and number lines.

Common misconception

Pupils may not realise that a count with a missing number or number in the wrong place is incorrect.

Reinforce the stable order of our counting to and from 10 and highlight clearly when that order is not correct or there is a number missing.

Keywords

  • One more than - One more than is when there is a greater amount by one or another item in the set.

  • One less than - One more than is when there is a smaller amount by one or an item has been removed from the set.

  • Compare - We compare to find out what is the same and what is different. We can compare numbers to find out if one is more than or less than another.

  • Order - We can order numbers from the smallest to the largest or from the largest to the smallest. The order stays the same when you count.

This lesson should be as practical as possibly with opportunities for pupils to count, handle beads and make use of number cards to generate opportunities to explore missing numbers.
Teacher tip

Licence

This content is © Oak National Academy Limited (2024), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Video

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6 Questions

Q1.
What number is one more than 2?
An image in a quiz
Correct Answer: 3, three, Three
Q2.
What number is one less than 6?
An image in a quiz
Correct Answer: 5, five, Five
Q3.
Are these number cards in the correct order?
An image in a quiz
Yes
Correct answer: No
Q4.
Which numbers cards are in the wrong order?
An image in a quiz
4 and 5
5 and 6
Correct answer: 4 and 6
Q5.
Are these number cards in the correct order?
An image in a quiz
Yes
Correct answer: No
Q6.
Which numbers cards are in the wrong order?
An image in a quiz
6 and 7
Correct answer: 6 and 8
7 and 8

6 Questions

Q1.
Which number card is missing?
An image in a quiz
3
4
Correct answer: 5
6
Q2.
Which number card is missing in this set?
An image in a quiz
4
Correct answer: 6
5
7
Q3.
Which number count is correct?
10. 9. 8, 7, 6, 5, 4, 2, 1
10, 9, 7, 6, 5, 4, 3, 2, 1
Correct answer: 10, 9, 8, 7, 6, 5, 4, 3, 2, 1
Q4.
The missing bead string is one more than 3. Which is the missing bead string?
An image in a quiz
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
Q5.
The missing number is one more than 5 and one less than 7. Which card shows the missing number?
An image in a quiz
Correct Answer: An image in a quiz
An image in a quiz
An image in a quiz
An image in a quiz
Q6.
Choose 2 sentences that describe the missing number in these cards.
An image in a quiz
The missing number is one more than 4
Correct answer: The missing number is one more than 3
The missing number is one less than 3
Correct answer: The missing number is one less than 5

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