Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xK/ Esercizi: http://www.khanacademy.org/exercises?exid=average_word_problems Traduzione in Italiano del video Averages http://www.youtube.com/watch?v=9VZsMY15xeU http://www.khanacademy.org/video/averages?playlist=Algebra Help us caption & translate this video! http://amara.org/v/B2xK/