Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2uC/ Traduzione in Italiano del video Subtracting Whole Numbers http://www.youtube.com/watch?feature=player_embedded&v=sAw71J2kYJE http://www.khanacademy.org/math/arithmetic/addition-subtraction/v/subtracting-whole-numbers