Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2xn/ Traduzione in Italiano del video Why borrowing works http://www.youtube.com/watch?v=fWan_T0enj4 http://www.khanacademy.org/video/why-borrowing-works?playlist=Arithmetic Help us caption & translate this video! http://amara.org/v/B2xn/