New
New
Year 1

Finding one more and one less with manipulatives and images

You can find one more and one less with manipulatives and images.

New
New
Year 1

Finding one more and one less with manipulatives and images

You can find one more and one less with manipulatives and images.

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Lesson details

Key learning points

  1. Secure understanding of one more and one less using using a variety of manipulatives and pictures.
  2. Use stem sentences including one more than and one less than.

Common misconception

Incorrect sequence of counting when recalling the next and previous numbers.

Start with parts of the sequence where pupils are confident to secure the concept of counting on for one more and back for one less.

Keywords

  • One more - The next number in the count is one more than the number before and there will be one more object in the set.

  • One less - The previous number in the count is one less than the next number and there will be one fewer object in the set.

Encourage pupils to see patterns when arrays, grids and bead strings are used to display numbers and ask them to identify the one more or the missing one when the image displays one less or fewer.
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.
When you count to 20, which number do you say before 15?
Correct Answer: 14, fourteen
Q2.
When you count back from 20 to zero, what number comes before 15?
Correct Answer: 16, sixteen
Q3.
Count up from 1 in a whispering voice and stop at 17. What number will you say next?
Correct Answer: 18, eighteen
Q4.
Count back from 20 in a loud voice and stop at 13. What number will you say next?
Correct Answer: 12, twelve
Q5.
What number bead string is missing?
11
12
13
Correct answer: 14
15
Q6.
Which bead string shows 14?
Correct answer: The top one
The bottom one
Neither

6 Questions

Q1.
Which picture shows one more than the number of chicks?
A
B
Correct answer: C
Q2.
Which picture shows one less than the number of pens?
Correct answer: A
B
C
Q3.
What number comes next?
12
Correct answer: 13
14
15
Q4.
What number is one less than 12?
10
Correct answer: 11
12
13
Q5.
What number is one more than 16?
Correct Answer: 17, seventeen
Q6.
What number is one less than 16?
Correct Answer: 15, fifteen

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