Monthly Archives: April 2015

Modelling percentage change with Numicon

Percentage changes can be effectively modelled using Numicon.  Here’s an example: reducing a price by £30: 

Another:

Even for more complex ideas, like working out the percentage change, using Numicon can clearly model the process:

Further opportunities for children to demonstrate depth of understanding could include asking them to represent the same question using multi-link cubes, rather than using ‘more difficult numbers’. When they have a reliable understanding of what happens during percentage change, then they can work on the abstract formulae. 

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