Problema a Parole Sulla Sottrazione Di Numeri Misti

Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uQ/ Traduzione in Italiano del video Subtracting Mixed Numbers Word Problem http://www.youtube.com/watch?feature=player_embedded&v=tj9oLZYA-AQ http://www.khanacademy.org/math/arithmetic/fractions/v/subtracting-mixed-numbers-word-problem Help us caption & translate this video! http://amara.org/v/B2uQ/