Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2ub/ Esercizi: http://www.khanacademy.org/exercise/place_value Traduzione in Italiano del video Place Value 2 http://www.youtube.com/watch?feature=player_embedded&v=wd4cRAoBOiE http://www.khanacademy.org/math/arithmetic/multiplication-division/v/place-value-2