来自刘珑龙的问题
小学六年级数学2/(1/3)+2/(2/3)+2/(3*4)+······+2/(2008*2009)=?抱歉，有些错误。2/(1*2)+2/(2*3)+2/(3*4)+······+2/(2008*2009)=？
小学六年级数学2/(1/3)+2/(2/3)+2/(3*4)+······+2/(2008*2009)=?
抱歉，有些错误。2/(1*2)+2/(2*3)+2/(3*4)+······+2/(2008*2009)=？
