Primary school mathematics algorithm power competition

1. Research on how to improve the ability of mathematics calculation in primary school. But in the course of this year, I deeply realized that if a child's computing ability is not strong, it will have a great impact on the child's overall math performance. So in the usual teaching, we should pay attention to the cultivation of students' computing ability. But how to cultivate students' computing ability? I would like to express my opinion:
first, master the "addition and subtraction method within 10" and "addition and subtraction method within 20". As a key starting stage, elementary learning of addition, subtraction, multiplication and division will have a profound impact on students' further learning. Teaching practice tells us that any complex problem is composed of a simple problem. Whether it's two digit multiplication and division, or two digit multiplication and division, or three digit, or other more complex calculation problems, their basis is "addition and subtraction within 10", "addition and subtraction within 20" and "99 multiplication formula". If these basic knowledge is not up to the standard and can't reach the level of blurting out without thinking, it will affect the later complex operation and reasoning. If you don't have a good command of "addition and subtraction within 10", "addition and subtraction within 20" and "nine nine multiplication formula", you will not be able to calculate quickly and accurately in the middle and senior grades< Second, strengthen the training of oral arithmetic ability Primary school mathematics syllabus pointed out: "to cultivate students' computational ability, we should pay attention to the basic training of oral arithmetic. Oral arithmetic is not only the basis of written arithmetic, estimation and simple calculation, but also an important part of computational ability."
only when the ability of oral calculation is strong, can the speed of written calculation be accelerated and the accuracy of calculation be improved. The teaching content of lower grades is relatively less. The teacher can time the children in class and let them do it. At this time, the students' attention is very focused, and it will also effectively improve the students' computing speed. It can also take the form of competition to read and calculate, which can often mobilize the enthusiasm of students, but this requires the teacher to have a clear idea of each child's level. Oral arithmetic is not only to time, more important is to give children to see right and wrong, for those who can test within the specified time to give a certain reward in time, cause students to pay attention to oral arithmetic, so as to improve the ability of oral arithmetic< Third, we should pay attention to the accumulation of wrong questions.
students' learning is a process of repeated understanding and practice, and mistakes are always inevitable. Especially for the younger students, the knowledge they just learned is easy to forget. Therefore, teachers should timely understand the problems existing in students' calculation, deeply analyze the causes of their calculation errors, and carry out targeted teaching. Teachers should focus on the analysis of the reasons for the wrong questions according to the person and the topic. Most students have done the wrong questions, so teachers should focus on explaining and analyzing the reasons for the mistakes; For students with poor foundation and often making mistakes, teachers should spend more time in tutoring after class. Students should reflect on the mistakes in their oral arithmetic. Each student should prepare a book, record the mistakes in the daily homework in the book, and write down the mistakes and correction methods. In addition, it is necessary to take the students' frequently wrong questions and similar questions as the students' classroom test, and feedback again to understand the students' learning effect after correcting the mistakes. The practice of correcting wrong questions requires students to judge right and wrong, find out the mistakes, analyze the causes of mistakes, and correct them. The class adopts the form of a little doctor to find the cause of disease competition, so that students can acquire knowledge in the competition“ "Correcting mistakes" can not only satisfy students to distinguish the causes of mistakes and correct them, but also achieve the effect of prevention< Fourth, help students understand the principles of calculation and reveal the rules.
in the teaching of calculation, let students understand the principles of calculation and know not only what they are, but also why they are. In this way, the teaching of calculation will become lively and colorful. Low grade students' intuitive thinking is dominant, and they graally transition to abstract thinking. Psychologists believe that thinking starts from action. To enable students to master mathematical knowledge and promote the development of thinking, it is necessary to build a bridge between image thinking and mathematical abstraction, and give full play to the role of learning tools. In the teaching of 9 plus a few, students can ask for a stick to study together. In the students' independent operation, we can optimize the ten methods, which will lay the foundation for further study of carry plus and abdication minus. We can also make use of students' existing knowledge and experience to understand new knowledge, construct the main way of teaching knowledge structure, properly use old knowledge in teaching, assimilate new knowledge through analogy, and realize the positive transfer of knowledge, which is concive to students' understanding of new knowledge and recognition of new knowledge structure. For example, if you want to add, calculate and subtract, students will continue to learn through the connection between knowledge. Let students understand thoroughly, they can use the method of calculation correctly and skillfully< Fifth, cultivate the junior students to develop good calculation habits
good calculation habits directly affect the formation and improvement of students' calculation ability. Many students can understand and master the algorithm, but they often make mistakes, mainly e to the lack of strict training and good learning habits
to improve students' computing ability, we must pay attention to the cultivation of good computing habits. Make students form the habit of proofreading carefully. The students are required to proofread the copied topics carefully, ranging from numbers and symbols, so as to make sure they are good. Make students form the habit of examining questions. Students are required to see each data and operation symbol clearly, determine the operation order, and choose a reasonable operation method. Make students form the habit of careful calculation and standard writing. Students are required to write neatly and the writing format should be standardized. At the same time, those who can do it by mouth should do it by mouth, while those who can't should do it by hand. In column vertical calculation, the number of digits should be aligned, and there should be an appropriate interval between the numbers. Make students form the habit of estimating and checking consciously. Teachers should teach students the methods of checking and estimating, and make strict demands on checking as an important part of the calculation process. It is advocated to use estimating to check the correctness of the answers
computing teaching is a long-term and complex teaching process, and it is not a matter of one day to improve students' computing ability. As the saying goes, if you want to develop a good skill, you must keep your fists together and keep your tongue in tune. So is the cultivation of oral arithmetic ability. It is a cumulative process, only the joint efforts of teachers and students can be effective.

2. First of all, understand and firmly grasp the basic knowledge. That is, the basic knowledge related to computing power, mainly refers to mathematical concepts, operation laws, operation properties, operation rules and calculation formulas. It is difficult for students to understand some calculation rules. In teaching, teachers should not be in a hurry for success, but should help students to master basic knowledge as a breakthrough, disperse and break through difficulties. For example, when teaching the addition and subtraction method of different denominator fractions, first of all, let students understand that the denominator is different, that is, the units of fractions are different. If the units of fractions are different, they can't add and subtract directly. When they understand this truth, they can guide students to use the knowledge of general score to change the different denominator fractions into the same denominator fractions, so the problem turns into the addition and subtraction of the same denominator fractions that they have learned
Second, strengthen the practice and basic skills training. In the calculation practice, strengthening the basic skills training is an important step to improve the calculation ability. In addition, in the calculation practice, we should help students summarize some regular things, so that they can skillfully use the basic knowledge to calculate, and constantly improve their calculation ability. In addition, the forms of calculation exercises should be diversified, and the forms should serve the content. However, we should pay attention to the quantity of exercises. We can't do the opposite as long as we don't pay attention to the quantity and quality. Some students lack the spirit of diligent learning, and the calculation itself is boring and lack of plot. When students encounter a large number of questions, they are easy to resist and unwilling to calculate, which can seriously affect students' interest in learning mathematics. In teaching, as teachers, we should simplify the topic selection, Try to find some simple calculation problems to guide students to do abstruse calculation problems
thirdly, cultivate students' good study habits. Good learning habits are the guarantee to improve the accuracy of calculation. First of all, students are required to carefully review the calculation, and do not blindly simplify the calculation without reviewing the operation order, such as 15 + 5 × 5), the students mistakenly calculated it as 20 × Secondly, the calculation process should be strictly standardized. When solving problems, students are required to have standard calculation format, neat writing, clean homework and paper surface. Even the draft should be written neatly and clearly. When students make mistakes in calculation, students should not only check the calculation process, but also find out whether there are errors in the draft. For example; The alignment of digits, whether the carry is added or not. Let the students form the habit of self checking in calculation< Fourth, strengthen the cultivation of the ability of oral calculation.
calculation is the basis of estimation and written calculation. Any four item mixed calculation problem is synthesized by the oral calculation problem of the main road. The correctness and rapidity of oral calculation directly affect the improvement of the calculation ability. When designing oral calculation exercises, we should be targeted, from easy to difficult, and graally improve them, including some simple calculation problems, It is helpful to train students' thinking flexibility to do oral arithmetic exercises frequently.

3. Computational ability is a basic mathematical ability. It is an important task of primary school mathematics teaching to cultivate primary school students' computational ability. Calculation is a complex intellectual activity, and calculation ability is also the embodiment of comprehensive ability. The cultivation of computational ability is not only closely related to the basic knowledge of mathematics, but also influenced and promoted with the training of students' thinking and non intelligence factors. The calculation ability of primary school students is the basic ability of mathematics learning, mathematical inquiry and thinking. When I do my homework, I often find that many students have a high rate of calculation errors. The high calculation error rate is also an important factor affecting the improvement of students' mathematics performance. There are no more than three reasons: first, the basic knowledge is poor, so we can't understand the basic operation steps and methods, and we can't understand the calculation theory; Second, when the number is small, the idea of "belittling the enemy" comes into being; Third, when the number is large, the calculation is complex, and the patient is impatient, resulting in boredom. There are also some students with improper attitude in calculation: the handwriting is scribbled, the writing is not standardized, and they do not do the questions according to the requirements, so it is inevitable to make mistakes in calculation
How can we overcome the above factors that affect students' correct calculation? According to my own teaching practice, I think to improve students' computing ability, we can start from the following aspects
first, cultivate students' interest in learning, which is the key to improve their computing ability
"interest is the best teacher". In the teaching of calculation, first of all, we should stimulate students' interest in calculation, make them willing to learn and do, teach them to calculate with oral, written and calculation tools, and master certain calculation methods, so as to achieve the goal of accurate and fast calculation. Pay attention to the form of training, stimulate interest in computing. In order to improve students' interest in calculation, we can make students practice some oral arithmetic every day, combining with the daily teaching content. While emphasizing calculation, we should pay attention to the diversification of training forms. Such as: training with games, competitions, etc; Use cards and small blackboards to see and listen; Limited time oral calculation, self compiled calculation problems, etc. Various forms of training can not only improve students' interest in computing, but also help them form good computing habits. Monotonous mechanical calculation makes students tired and distracted. Teachers can work hard in the form of practice, can make multiple-choice questions, judgment questions, can also make some exercises related to real life, stimulate students' interest in calculation. The senior grade of primary school has learned many operation laws and operation properties. If students can skillfully use it, it can not only stimulate students' interest in calculation, but also improve their calculation ability
Second, pay attention to cultivate students' good calculation habits
first, we should examine the topic carefully
in teaching, students should be trained to examine the questions carefully and see each data and operation symbol clearly. In teaching, I guide students to go in three steps: first, we should examine numbers and symbols, and observe their characteristics and internal relations; Second, it is necessary to examine the order of operations and make clear what is calculated first and then; Third, we should examine whether the calculation method is reasonable and simple, and analyze the characteristics of calculation and data. According to the nature and law of operation, judge whether it can be simplified< Second, concentrate on the school team
when ing the calculation questions, the school team must be in time to do a lot of good work. Just imagine, the title is copied wrong, how can the result be correct? But in calculation, it is very common for students to wrong numbers or symbols. Therefore, I have set strict requirements for students to questions, and formulated corresponding rewards and punishment measures. If the homework is excellent five times in a row, you can get a five pointed star. If you have five five pointed stars, you can give praise in class, and call on the whole class to learn from him; If there are two or more calculation errors in any homework, ten calculation problems will be punished
Third, check the calculation carefully
some students think checking calculation is dispensable, while others feel that checking calculation is troublesome. Checking calculation can not only ensure correct calculation, but also cultivate students' meticulous attitude towards learning< Fourthly, it should be revised in time
if the errors in the assignment are common, they can be corrected collectively; If it is indivial, let the students correct it by themselves, and carefully analyze the causes of the mistakes, so as to avoid similar mistakes in the future. I also asked students to set up a book to pick up mistakes, record the mistakes in time and review them frequently to prevent similar mistakes
fifthly, writing standard
in every homework and exercise, I require students to write neatly and in a standard format. The writing of numbers, decimal points and operational symbols in the title must be standardized and clear. The space between the numbers should be appropriate, the vertical type on the draft should be clear, and the numbers should be aligned. At the same time, the guidance of writing format should be strengthened. The standardized writing format can express students' operation ideas, calculation methods and steps, and prevent wrong writing, less numbers and operation symbols< Third, pay attention to the training of oral arithmetic< At the same time, oral arithmetic is the basis of written arithmetic. Only by improving oral arithmetic can we improve the speed and accuracy of written arithmetic. Therefore, I often strictly carry out oral arithmetic training for students, including visual arithmetic training, listening arithmetic training, rush answer training, oral arithmetic games, etc., and strive to achieve the right and fast degree< 4. Emphasis on written calculation
pen calculation is traditionally called vertical calculation, which is a method of calculating on paper with pen according to certain calculation rules. Written calculation is not limited by the size of the number, we must write the calculation process step by step. Written calculation is concive to students' understanding of calculation theory, and it is also convenient to find and check the errors in the calculation process. It can also cultivate students' serious, responsible and meticulous learning attitude. Due to the procere of written calculation, the process of written calculation is relatively fixed, so in teaching, we should focus on making students understand the principle of calculation< 5. Strengthen the awareness of estimation
mathematics curriculum standard points out that estimation should be strengthened in each period. Estimation is the ability to approximate or roughly estimate the operation process and calculation results. In addition to mathematics learning, we need to test whether the answer is reasonable through estimation. In daily proction and life, estimation is also indispensable. Therefore, estimation has important practical value
1. Estimation teaching focuses on cultivating students' estimation consciousness, infiltrating estimation teaching into normal teaching, using estimation to preliminarily verify whether the calculation results are reasonable, and correcting them in time, so as to improve the accuracy of calculation. In teaching, we should let the students accumulate the experience of estimation and realize the value of estimation
2. Teachers should pay attention to teaching students estimation methods, and allow the diversity of estimation methods. As estimated, 78 × 22. The following estimates are reasonable; seventy-eight × 22≈80 × 22=1760278 × 22≈78 × 20=1560378 × 22≈80 × 20 = 1600
in a word, the improvement of students' computing ability is not achieved overnight, it is a long-term training and accumulation process. This requires our teachers to become interested people in teaching. As long as we carefully study, constantly summarize and improve our work, and seriously excavate the ability factors in calculation problems, students' calculation ability will be improved

4. A person's mathematical calculation ability mainly includes three aspects: the accuracy of calculation results, the skill of calculation methods and the quickness of calculation speed. In order to improve primary school students' mathematical calculation ability, I think we should work hard from the following four aspects: first, let students master the operation laws and regulations: in primary school, students should learn three kinds of numbers - integer (natural number), integer (natural number) Decimals and fractions, these three types of numbers need to carry out four operations - addition, subtraction, multiplication and division. Each operation of each type of numbers has its own specific algorithm. Mastering all kinds of algorithms is the foothold and starting point for comprehensively improving primary school students' mathematical calculation ability.

5.

For those pupils with poor grades, it is very difficult to learn primary school mathematics. In fact, primary school mathematics belongs to the basic knowledge, and it is relatively easy to master certain skills. In primary school, it is a period that needs to develop good habits. It is important to pay attention to the cultivation of children's habits and learning ability. What skills do primary school mathematics have

It can be seen from this that the skill of primary school mathematics is to do more exercises and master basic knowledge. In addition, it is mentality. If you can't be timid before the exam, it's very important to adjust your mentality. Therefore, you can follow these skills to improve your ability and make yourself enter the ocean of mathematics