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数与式是进入初中首先接触的数学知识,它渗透到后面各部分内容之中。联系着所有数学知识,它是开展数学学习和研究的基础,也是中考的重要考点之一,纯数与式的考题一般出现在中考试卷的填空、选择或解答题的前几道题的位置,分值占总分数的20％以上,这部分内容的考题难度不大。但涉及的基本概念和知识点较多,同学们复习这部分内容时要注意理顺知识网络,搞清概念的本质,下面以2005年中考题为例。归纳分析数与式易考重点题型。
Numbers and formulas are the first mathematical knowledge that comes into junior high school. It penetrates into the content of the following sections. All mathematics knowledge is linked, it is the basis for carrying out mathematics study and research, and is also one of the important test points for the Chinese exam. The exams for the pure number and formula are generally found in the first few questions of the blanks, choices or answers to the questions in the exam paper. Scores accounted for more than 20% of the total score, this part of the content of the test is not difficult. However, the basic concepts and knowledge involved are more. Students should pay attention to rationalizing the knowledge network and clarify the nature of the concept when reviewing this part of the content. Take the 2005 mid-term exam questions as an example. Summarize and analyze the number and type of easy exam questions.