Vermenigvuldigen met streepjes

Posted on December 21, 2010 by Sander

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2 thoughts on “Vermenigvuldigen met streepjes”

Arnd Brugman on December 21, 2010 at 13:49 said:

Pi*V2?

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LaLa on December 21, 2010 at 18:32 said:

Wow, nicee

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