Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xe/ Esercizi: http://www.khanacademy.org/exercises?exid=units Traduzione in Italiano del video Unit conversion http://www.youtube.com/watch?v=w0nqd_HXHPQ http://www.khanacademy.org/video/unit-conversion?playlist=Pre-algebra