Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uB/ Traduzione in Italiano del video u09 l1 t2 we4 Adding Real Numbers Application http://www.youtube.com/watch?feature=player_embedded&v=fFdOr8U4mnI http://www.khanacademy.org/math/arithmetic/addition-subtraction/v/u09-l1-t2-we4-adding-real-numbers-application