Computing ability is a basic ability in mathematics examination, but the problem reflected at present is that many candidates lack computing ability. "In the process of marking papers, we often see that the candidates' problem-solving methods and ideas are correct, but the calculation is wrong. Many solutions are multi-step calculation, and the calculation error in the middle step will directly lead to the corresponding errors in the subsequent solutions, resulting in serious loss of points. In a word: it's not that I can't, it's that I miscalculated! "

Among these mistakes, the most common one is the error of "algebraic identity deformation (including pure digital operation)", including algebraic expression, fractional and quadratic radical operation, factorization and so on; Secondly, there is an error in solving equations (groups) and inequalities (groups), which is easy to prevent. In fact, when solving an equation or equation group, we can find out whether the solution is correct by substituting it into the original equation or equation group, and we can consider using the endpoint of the solution set or some special values to solve inequalities or inequality groups.

★ Unnecessary mistake 2: The answer is not standardized

Mathematics problems clearly require candidates to write written explanations, proof processes and calculus steps. Candidates must understand that doing the problem is actually writing a math composition! Instead of writing a bunch of mathematical formulas and symbols on the test paper, we should silently show the thinking process of solving problems to the marking staff. Many candidates' written explanations are not satisfactory, which proves that the process conditions are not obvious, the reasoning is not in place, the calculation steps are not meticulous and proper, and the paper is not neat. Some candidates' writing style is unclear and puzzling, and the marking teacher needs to guess their intentions to solve the problem.

Don't touch the "red line" required by the answer to the college entrance examination: you must write the answer with the corresponding question number in the specified answer area. Some candidates write some answers outside the designated area, and even some candidates change the question number of the answer sheet, for example, changing "18" to "19" in the answer area of 18, and writing the answer of 19 in this area will be regarded as zero.

★ meaningless error 3: the answer is not selected.

Fill-in-the-blank questions are also more "meaningless points" for candidates. Some candidates do not choose answers when filling in the blanks, that is, the topics selected on the answer sheet are inconsistent with the actual situation, but the test paper is judged according to the selected topics, and of course, no points are given.

In addition, the results given by candidates are not standardized, and it is easy to lose points. For example, the answer is a calculated specific number, but the examinee only gives the formula that was not calculated in the middle step, and so on.

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