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Khan Academy italiano: Proprieta' Commutativa della Moltiplicazione

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uf/ Esercizi: http://www.khanacademy.org/exercise/properties_of_numbers_1 Traduzione in Italiano del video Commutative Law of Multiplication http://www.youtube.com/watch?feature=player_embedded&v=ENKH97PYssg http://www.khanacademy.org/math/arithmetic/number-properties/v/commutative-law-of-multiplication Help us caption & translate this video! http://amara.org/v/B2uf/