Friday, August 26, 2011

Maths Activity

This week Ive been learning the reversibility strategy for example: 137-69 then you reverse it 69+something=137=69+1=70then70+30=100then 100+30=130+7 then you add the 1 , 30 ,30 and 7 then you add them all together and you have your answer. I am confident in using this strategy

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