Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2x6/ Esercizi: http://www.khanacademy.org/exercises?exid=exponents_1 Traduzione in Italiano del video Level 1 Exponents http://www.youtube.com/watch?v=8htcZca0JIA http://www.khanacademy.org/video/level-1-exponents?playlist=Pre-algebra Help us caption & translate this video! http://amara.org/v/B2x6/