Entering high school covers a wide range and the topic is difficult. There are many knowledge points, and the explanation is detailed! The examples in this handout are extensions and extensions of classroom exercises. Examples have detailed ideas and solutions for solving problems, and exercises also have complete solutions to facilitate students' self-study.

But in the exam, it is more difficult than the handout, which is very suitable for top students and gifted students. The difficulty of the topic is equivalent to the Olympics! The examples and exercises of "Walking into the Notes on Higher Education: Mathematics (the first volume of Grade 8)" are very representative, mainly from the examination questions and competition questions of the senior high school entrance examination in recent years. Through example analysis, exercises and extended training of knowledge points, students can master the core content of textbook knowledge, so as to find the general law of solving problems.