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Transforming lives through learning
Scottish Survey of Literacy & Numeracy
Support Material
Second Level - FractionsClassroom version
Produced by Education Scotland
Transforming lives through learning
16
X
3
1616161616
Finding a fraction of an amount
StrategiesStrategy 1 Step 1:
StrategiesStep 2
Split the pizza into 5 equal parts: Now share 5400 equally between the 5 slices – 1080 on each slice.
Strategies
StrategiesRemove one fifth to leave four fifths:
Add 1080 + 1080 + 1080 + 1080 to find the answer.
• Is one of the two strategies easier?• Might one strategy be better in one situation and the other for a
different problem?
Finding a fraction of an amount
Strategy
400g
Whole Amount
200g 200g
100g
100g 100g
100g
50g
50g50g
50g 50g 50g
50g50g
2 Halves 4 Quarters 8 Eighths
Strategies
Splitting into convenient groups of 4 Counting and shading 1,2,3 and
leaving the 4th un-shaded.
Strategies
Consider though not only shading 3 out of every 4 circles, but also consider shading 3 out of 4 rows
Simplifying fractionsSuppose we want to simplify the fraction
Draw two identical rectangles.Split one into 8 equal parts and the other into 4 equal parts.Shade the same area in each:
8
2
What fraction of the first rectangle is shaded?
What fraction of the second rectangle is shaded?
4
1
8
2
Comparing fractions
Comparing fractionsWould laying the two rectangles over one another help?
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