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.
