Tuesday, July 29, 2008

Thirding

Room's 1 maths group the Spheres is learning about doubling, halving and thirding.  First, we learnt about doubling and halving, like in a multiplication equation you would take the easiest number to halve and halve it, and take the easiest number to double and double it, in order to get the answer, for example...5 x 18 = 10 x 9 = 190 - see?
All I did was double the 5 and halve the 18 in order to get the answer. 
Thirding is just the same except you do it in threes. Like 24 x 3, I third the 24 and triple the 3 to get 24x3=8x9=72!    
This strategy is really cool and I'm sure it will help me heaps in bigger maths problems when I'm older! 

By Gloria Harvey

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