According to Dangdang. Com, the price of the first volume of the fourth grade mathematics test paper of Beijing Normal University is 28.8 yuan. This test paper covers the key and difficult points of this semester's study, with various types of questions, including fill-in-the-blank questions, multiple-choice questions, calculation questions, application questions and so on. It can comprehensively test students' basic knowledge of mathematics, calculation ability, logical thinking and problem-solving ability, and the test paper is moderately difficult.