Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xU/ Esercizi: http://www.khanacademy.org/exercises?exid=divisibility Traduzione in Italiano del video Greatest Common Divisor http://www.youtube.com/watch?v=jFd-6EPfnec http://www.khanacademy.org/video/greatest-common-divisor?playlist=Arithmetic Help us caption & translate this video! http://amara.org/v/B2xU/