Dear students and teacher who are studying and teaching at grade 12 Advance Level. This is the government Khmer Mathematics solution book grade 12 Advance Level in pdf file chapter by chapter. This solution prepared by teacher Sokun who worked at WIS and WU. You all can download and keep it in your computer, Ipad or smart phone so that you can use it anytime you want. Don’t just use smart phone for calling, gaming Facebook or YouTube, you also can use it for keep some books to read and study wherever you want.