1. Using ratios 1) Check these fraction simplifications are correct.
[N3.2 Support Starter]
1) Check these fraction simplifications are correct.
a) b) c)
d) e) f)
Are there easier ways to check without actually doing the simplification?
Use a calculator if you wish.
2) Show how you would calculate of 24 so that someone else can understand.
Preamble
The first activity asks pupils to check some fraction simplifications and they should
be asked to explain how they carried out the checking. Some pupils may need
support explaining how they calculate fractions of a number.
Possible content
Simplifying fractions, calculating fractions of a number.
Resources
None.
Solution/Notes
(1)
Possible methods of checking include changing both fractions to decimals or checking that the same “scale factor” applied to both denominators and numerators.
Pupils’ own work – some may need prompting that the calculation may be seen as
three lots of (a quarter of 24) – or a quarter of (3  24) it may also be useful to encourage pupils to use rectangles on square paper as a pictorial aid.
Original Material © Cambridge University Press 2010
Original Material © Cambridge University Press 2010