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).

Starter quiz

6 Questions

Q1.
Is 8 the whole or a part?
part
Q2.
Is 5 the whole or a part?
whole
Q3.
What is the whole?
2
3
4
Q4.
What is the missing part?
3
4
5
Q5.
Which part-whole model is showing Alex’s cars correctly partitioned?
Correct Answer: An image in a quiz
Q6.
Which part-whole model is showing Laura’s cars correctly partitioned?
Correct Answer: An image in a quiz

Exit quiz

6 Questions

Q1.
How many cubes are in the whole?
3
7
9
Q2.
How many cubes are in each part?
4
5
6
Q3.
Laura thinks the whole will be 6. Is she correct?
Yes
Q4.
Alex thinks the whole will be 6. Is he correct?
No
Q5.
Alex thinks that the part can be bigger than the whole. Is he right?
Yes