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http://www.glad2teach.co.uk/fast_maths_calculation_tricks.htm
Mind you, I can do the simple multiplication in my head already, but I didn't know the squares trick, and now I'm thinking of spending the 25 bucks...
I don't even do math all that much except when I'm helping the children!
Mind you, I can do the simple multiplication in my head already, but I didn't know the squares trick, and now I'm thinking of spending the 25 bucks...
I don't even do math all that much except when I'm helping the children!
