# Find one-third or one-quarter of a number

I can find one-third or one-quarter of a number.

# Find one-third or one-quarter of a number

I can find one-third or one-quarter of a number.

## Lesson details

### Key learning points

- To find a third of a number, you divide the whole into 3 equal parts.
- To find a quarter of a number, you divide the whole into 4 equal parts.
- It is helpful to use a bar model to help you find one-third or one-quarter of a number.

### Common misconception

Children may confuse finding a quarter of a number with finding 4 of the objects, or finding a third of a number with finding 3 of the objects.

Use the stem sentence 'the whole has been divided into ___ equal parts' and draw a bar model to represent this before children attempt to find a quarter or a third of a number.

### Keywords

Third - 1 of 3 equal parts of a whole.

Quarter - 1 of 4 equal parts of a whole.

### 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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## Starter quiz

### 6 Questions

four equal parts, -

each part is one-quarter.

two equal parts, -

each part is one-half.

three equal parts, -

each part is one-third.

$$ \frac{1}{2} $$ of 18 = -

9

$$ \frac{1}{2} $$ of 12 = -

6

$$ \frac{1}{2} $$ of 16 = -

8

$$ \frac{1}{2} $$ of 14 = -

7

$$ \frac{1}{2} $$ of 20 = -

10

$$ \frac{1}{2} $$ of 10 = 5 -

5 = $$ \frac{1}{2} $$ of 10

$$ \frac{1}{2} $$ of 20 = 10 -

10 = $$ \frac{1}{2} $$ of 20

$$ \frac{1}{2} $$ of 14 = 7 -

7 = $$ \frac{1}{2} $$ of 14

$$ \frac{1}{2} $$ of 18 = 9 -

9 = $$ \frac{1}{2} $$ of 18

## Exit quiz

### 6 Questions

To find one-third of a number, -

you divide the whole into 3 equal parts.

To find one-quarter of a number, -

you divide the whole into 4 equal parts.