New
New
Year 3

# Explain the size of a part in relation to the whole

I can explain the size of a part in relation to the whole.

New
New
Year 3

# Explain the size of a part in relation to the whole

I can explain the size of a part in relation to the whole.

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## Lesson details

### Key learning points

1. Parts of the same sized whole can be compared.
2. A bigger or smaller part of the whole can be shown.
3. Different parts of the same sized whole can be directly compared based on their size.

### Common misconception

The part changes size when the whole changes.

Use the bottles example in the slides to overcome this. Have a range of different sized containers for water and demonstrate the concept practically.

### Keywords

• Whole - The whole is all the parts or everything, the total amount.

• Part - A part is some of the whole.

• Equal - We say that two or more things are equal if they have the same quantity or value.

• Unequal - We say that two or more things are unequal if they do not have the same quantity or value.

• Inequality - Inequality occurs when things are not equal. We use different symbols to show this.

Use plenty of real practical examples here. You might want to get some water bottles to use! Some of the contexts (maps of Europe or the UK) may not be relevant in your context so choose something different to engage the children you teach.
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.
What is the missing label in this bar model?
Q2.
Look at the sequence of months. Which season is missing?
Spring
Autumn
Winter
Q3.
Which inequality symbol should be inserted between these two numbers: 3 ___ 10
>
=
Q4.
Which circle has been split into equal parts?
Correct Answer: An image in a quiz
Q5.
Which inequality symbol should be inserted between these two glasses of squash?
<
Q6.
Which inequality symbol should be inserted between these two expressions: 4 + 3 ___ 5 + 1
<

## Exit quiz

### 6 Questions

Q1.
True or false? Parts can be equal or unequal.
False
Q2.
Which inequality symbol goes in here to compare how much water is in each bottle?
<
=
Q3.
Which inequality symbol goes in here to compare how much of the circle is shaded?
<
=
Q4.
Which of these glasses of squash is described by: the squash is a smaller part of the glass.
Correct Answer: An image in a quiz
Q5.
Which word fits into the blank part of the following sentence: If Europe is the whole, the UK is a __________ part of the whole.
important
bigger
less