Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uK/ Esercizi: http://www.khanacademy.org/exercise/adding_fractions Traduzione in Italiano del video Adding Fractions with Unlike Denominators http://www.youtube.com/watch?feature=player_embedded&v=OVMceVL_CEQ http://www.khanacademy.org/math/arithmetic/fractions/v/adding-fractions-with-unlike-denominators