Addizione Livello 2

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2yJ/ Esercizi: http://www.khanacademy.org/exercises?exid=addition_2 Traduzione in Italiano del video Level 2 Addition http://www.youtube.com/watch?v=27Kp7HJYj2c&feature=player_embedded http://www.khanacademy.org/video/level-2-addition?playlist=Arithmetic Help us caption & translate this video! http://amara.org/v/B2yJ/