Description 1. Addition and Subtraction of Fractions 2. Triangles 3. Addition and Subtraction of Decimals 4. Quadrilaterals 5. Line Graphs 6. Polygons 〈Composition and Features〉 ▶ Main Study Book 1. Learning the Concepts The core textbook concepts are explained in detail, with activity problems designed to help students understand what they've read. Textbook and workbook concept questions are also included on the facing page so students can immediately check their understanding. 2. Building the Basics Focused practice problems for each concept help build a strong foundation and prepare students to develop their skills further. Solve all the essential basic problems, including textbook and workbook questions as well as descriptive (short-answer) questions. 3. Developing Applied Problem-Solving Skills Real math ability comes from strengthening problem-solving skills through applied questions. Complete your understanding by solving representative applied problems for each unit. 4. Unit Assessments To help wrap up each unit, problems ranging from basic to applied levels are provided. Frequently tested school exam questions have also been selected, making this section useful for preparing for regular assessments and school exams. ▶ Skill-Building Supplement Book - Practice step by step, starting with guided writing exercises, to prepare for descriptive (short-answer) questions. - Solve unit assessment problems once more for extra reinforcement.