New
New
Year 1

Use a part-whole model to represent a whole partitioned into two parts

I can use a part-whole model to represent a whole partitioned into two parts.

New
New
Year 1

Use a part-whole model to represent a whole partitioned into two parts

I can use a part-whole model to represent a whole partitioned into two parts.

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Lesson details

Key learning points

  1. A whole group can be split in different ways and the 2 parts may look different.
  2. Add a numeral to the whole position when the objects have been moved out.
  3. Use part-part-whole diagrams in different orientations.
  4. Include examples where the two parts contain the same number of items.
  5. Represent the whole and the parts using numerals alongside the concrete and pictorial representations.

Common misconception

When using the part-whole model, children may think that the whole is also one of the parts.

When using the part-whole model, move the objects out of the whole into the parts, and replace the whole with a number.

Keywords

  • Whole - All of something. Complete.

  • Part - A piece of a whole.

  • Partition - To break up a whole into parts.

  • Part-part-whole - A pictorial representation that shows the whole and its parts.

When using the part-whole model we need to clearly show that the whole is partitioned into the parts and is not included as one of the parts. For each example, repeatedly move the objects back and forth to represent splitting /combining of the parts
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.
Is 8 the whole or a part?
An image in a quiz
Correct answer: whole
part
Q2.
Is 5 the whole or a part?
An image in a quiz
whole
Correct answer: part
Q3.
What is the whole?
An image in a quiz
2
3
4
Correct answer: 5
Q4.
What is the missing part?
An image in a quiz
Correct answer: 2
3
4
5
Q5.
Which part-whole model is showing Alex’s cars correctly partitioned?
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
Q6.
Which part-whole model is showing Laura’s cars correctly partitioned?
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

6 Questions

Q1.
How many cubes are in the whole?
An image in a quiz
3
Correct answer: 6
7
9
Q2.
How many cubes are in each part?
An image in a quiz
Correct answer: 3
4
5
6
Q3.
Laura thinks the whole will be 6. Is she correct?
An image in a quiz
Yes
Correct answer: No
Q4.
Alex thinks the whole will be 6. Is he correct?
An image in a quiz
Correct answer: Yes
No
Q5.
Alex thinks that the part can be bigger than the whole. Is he right?
Yes
Correct answer: No
Q6.
Laura thinks there is more than one way to partition 4 cubes. Is she right?
An image in a quiz
Correct answer: Yes
No

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