The Algebra of the 1st High School contains, paragraph by paragraph, following the school book, detailed theory in a question and answer format, in order to adequately cover the 1st topic of the final exams, then followed by solved basic exercises with their methodologies, for the consolidation of the theory and the first contact with the technical part of the material that prepares the ground for the exercises to be solved. In the 2nd part, the bank of topics announced by the IEK is followed, along with their official solutions, which cover the 2nd and 4th topic, as well as topics from previous years. Good study and we hope that this book will contribute to your personal success!