Explain why a part can only be defined in relation to a whole | Maths

Starter quiz

What is the missing label in this bar model?
- 'whole' ✓
What is the missing part in this bar model?
- '50' ✓
If I have two 20 pence pieces, how much money do I have altogether? ______ pence.
- '40' ✓
Look at the sequence of months of the year. Which month is missing?
- 'September' ✓
Starting with Winter, what is the correct order of the seasons?
- Winter, Autumn, Spring, Summer
- Winter, Autumn, Summer, Spring
- Winter, Spring, Summer, Autumn ✓
What is the missing part in this bar model?
- '20' ✓

Exit quiz

Fill in the missing word in this statement. If a year is the whole, then Spring is ______ of the whole.
- whole
- season
- sum
- part ✓
True or false. A part is always smaller than a whole.
- True ✓
- False
True or false. There are always 3 or more parts in a whole.
- True
- False ✓
Match the whole with the correct part.
- Europe
  
  ⇔
  
  UK ✓
- Classroom
  
  ⇔
  
  desks ✓
- Bird
  
  ⇔
  
  feathers ✓
- A year
  
  ⇔
  
  February ✓
Look at the image. Which statements are correct?
- If Europe is the whole, then the UK is a part of the whole. ✓
- If the world is the whole, then the UK is a part of the whole. ✓
- If the UK is the whole, then the world is part of the whole.
Which of these statements is correct?
- The whole defines the part. ✓
- The part defines the whole.

Worksheet

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Presentation

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Lesson Details

Key learning points

A part must be part of a whole.
If __ is the whole then __ is part of the whole.
The whole can be different in different situations.

Common misconception

Children may think that a part only needs to be something smaller than the whole and not part of it.

Spend some time identifying wholes in the classroom and then get the children to identify a part of it. Get the children to play games involving spotting non-examples to strengthen their understanding. Ensure the wholes you use are clearly defined.

Keywords

Whole - The whole is all the parts or everything, the total amount.
Part - A part is some of the whole.