Elementary mathematics is one of the three main courses in junior high school, which occupies a major position in junior high school. Junior high school mathematics is mainly composed of several plates, such as circular triangle, quadrilateral function, radical rational number equation, inequality geometry and so on. Among them, function and geometry are the most troublesome parts for students. Of course, function and geometry are also the key knowledge to be examined in the exam, so students also need to master solid knowledge, so they need a correct and efficient study habit and method.