Help us caption and translate this video on Amara.org: http://www.amara.org/en/v/B2x7/ Esercizi: http://www.khanacademy.org/exercises?exid=exponents_2 Traduzione in Italiano del video Level 2 Exponents http://www.youtube.com/watch?v=1Nt-t9YJM8k http://www.khanacademy.org/video/level-2-exponents?playlist=Pre-algebra