/ http://www.slideshare.net/images/logo.gif / ºÝºÝߣShare feed for ºÝºÝߣshows by User: SompophPhichitsiri https://cdn.slidesharecdn.com/profile-photo-SompophPhichitsiri-48x48.jpg?cb=1645260275 คณิตศาสตร์ คือ ชีวิต The Mathematics is My Life Math is Fun