Form a complete knowledge system in reality, and then consolidate the friendship among the test sites one by one according to the outline, and make a small-scale synthesis in the form of special topics, so that you can often lay a solid technical foundation in a round of review, and at the same time systematically master some common methods in mathematics, such as method of substitution's matching methods. In addition, we should pay attention to the study of problem-solving theory, the thinking method of mathematical problem-solving and the active application in problem-solving