1. Adding and subtracting fractions
[N2.2 Core Starter]
Put these fractions into groups of equivalent fractions.
What is the difference in size between the highest and lowest size group?
Preamble
This “puzzle” gives children practice in simplifying and subtracting fractions and is suitable for small groups, which would enable children to share out the work and to check each other's efforts. It might be useful to discuss as a group the various strategies for simplifying fractions, many children tend to shy away from “cancelling” in easy stages. A few children might not realise that fractions first need simplifying to enable grouping.
Possible content
Simplifying fractions, subtracting fractions.
Resources
None.
Solution/Notes
The fractions group into four sets
Which respectively simplify to
So the difference between largest and smallest is:
Original Material © Cambridge University Press 2010
Original Material © Cambridge University Press 2010