Cross-examination of mathematical calculation for information and computing science majors. It belongs to engineering, but also a little science, and it is not a math major or an interdisciplinary exam. Information and Computational Science is a science major that focuses on the mathematical basis of information technology, computing technology and operation control technology, and trains students to have good mathematical foundation and mathematical thinking ability, master the basic theories, methods and skills of information or computational mathematics, and receive preliminary training in scientific research.