Computing ability is the basic ability and foundation for students to learn mathematics. Cultivating and improving students' computing ability is one of the main tasks of primary school mathematics. The accuracy and speed of calculation will directly affect students' learning quality. Many students always think that calculating problems is much easier than analyzing and solving problems, so they are either overconfident or inattentive, and the results are full of mistakes. Therefore, computing teaching can not be ignored. How to improve students' computing ability and make them calculate correctly, quickly, flexibly and reasonably? In the teaching work, I did some discussion and research, and achieved some good results. I summarized the following points:

First, find problems and change students' understanding.

The mistakes made by students mainly include the following types:

(1) The title is wrong, copied wrong and scribbled. 6 and 0, 1 and 7 are ambiguous;

(2) When the columns are vertical, the numbers are not aligned.

(3) Do not make a draft when calculating;

(4) One-digit addition and subtraction calculation errors lead to errors in the whole question;

(5) Do not concentrate on your homework.

Judging from some students' calculation mistakes, there are two reasons for "carelessness": one is that children's physical and mental development is not mature enough, and the other is that they have not developed good study habits. On the one hand, it is a natural growth process, on the other hand, it can also be cultivated through corresponding methods. Therefore, while guiding students to analyze the reasons, it is important to cultivate students' good study habits, which is the key to improve students' computing ability and the basic requirement of quality education.

Second, cultivate students' good computing habits.

Most of the mistakes in problem calculation are caused by bad habits such as carelessness, carelessness and graffiti. Therefore, good computing habits are the guarantee to improve computing ability. In calculation training, students are required to look, think, calculate and check.

1, look: it is a serious logarithm. All the questions have been copied wrong. How can the result be correct? Therefore, students are required to check with the original questions or previous formulas in time when copying questions and calculating in each step to avoid copying wrong numbers or operation symbols. To do three things: ① Check the questions with the original questions after copying; (2) Check the vertical figures with the horizontal figures; (3) The number of horizontal inspections is the same as that of vertical inspections.

2, thinking: that is, carefully examine the questions. When guiding students to do a calculation problem, don't start with a pen, but first examine the problem, first make clear what the problem should be, then what it should be, and whether there is a simple calculation method before starting with a pen. In addition, the calculation must be accurate first and then fast.

3, calculation: it is to write carefully and calculate carefully. Homework and exercises should be written neatly, and the format must be standardized. The writing of numbers, decimal points and operation symbols in the topic should conform to the specifications, and there should be appropriate intervals between numbers. The vertical form of the draft should also be aligned with the figures, clear, and the calculation should be focused. Don't rush and grab.

4, inspection: it is necessary to calculate carefully. After calculation, first check whether the calculation method is reasonable; Secondly, check whether numbers and symbols will be copied wrong and whether decimal points will be misspelled or omitted; Third, every number obtained in the calculation process and the final result should be checked and calculated. Therefore, cultivating good study habits is an important way to prevent calculation errors and improve calculation ability.

Third, collect the types of wrong questions and prescribe the right medicine.

I usually design the requirements for students in the practice of correcting mistakes as follows: judging right or wrong → finding out the mistakes → analyzing the causes of the mistakes → correcting → summarizing the methods to prevent similar mistakes. There are many forms of exercises: you can do individual exercises, such as judging the questions, finding out the mistakes in each question, correcting the wrong questions, etc. You can also do comprehensive exercises; You can print all kinds of wrong questions on the homework paper and give them to students to correct in class. Students can also take out their exercise books and wrong questions, re-analyze and correct the wrong questions in their homework.

In a word, the cultivation of students' computing ability should run through the whole process of primary school mathematics teaching, which should not only strengthen the training of students' basic skills, but also pay attention to the targeted cultivation of students. As long as we study hard, constantly sum up and improve our work, and seriously explore the ability factors in calculation problems, students' computing ability will certainly be improved.