Abdication calculation

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. How can I hear you describe a blockchain company that can run its way

E-sports and AI are the two most popular blockchains, because they are easy to understand and easy to cheat
maybe you don't cheat, but those who cheat and run are all about E-sports and AI.

4. Cosmetic surgery, I think it must be your face has been seriously damaged, had to go to plastic surgery, if it is for the so-called beauty to do plastic surgery is really not worth the loss, congenital muscles and the relationship between the man-made damage, the acquired damage repair no matter how can not return to the original state. You can see the state of the elderly after plastic surgery. Therefore, if it is injury plastic surgery, you go to a face-to-face consultation, let the doctor determine the plan, if it is cosmetic plastic surgery, you also need an interview, but you need to put forward your own beauty requirements, that is, according to the existing conditions to change what it looks like, which needs to be prepared for class.

5. The Greek said, "this is because he wanted to destroy the gift to the goddess, so he was punished." the Trojan quickly pulled the horse to the city. But the Trojan horse was so big that it was higher than the city wall, so the Trojans had to tear it apart. That night, the Trojans were jubilant and celebrated their victory. They danced and sang, drank buckets of wine, and did not go home until late at night to rest and dream of peace
in the middle of the night, there was silence. The Greek who persuaded the Trojans to pull the horse into the city was actually a spy. He went to the side of the Trojan horse and tapped three times, which was the agreed signal. Hidden in the Trojan horse, fully armed Greek soldiers jumped out one by one. They quietly touched the gate, killed the garrison in their sleep, quickly opened the gate, and set fire everywhere in the city. A large number of hidden Greek troops flooded into Troy. Ten years of war is finally over. The Greeks plundered Troy and burned it to ashes. Most of the men were killed, most of the women and children were sold as slaves, Trojan treasures were loaded into the Greek warships. Helen was also brought back to Greece by Menez. The Trojan War ended. In 1193 B.C., Priam, king of Troy, and his handsome second son, Prince Paris, were warmly treated in the palace of Menelaus, king of Sparta, Greece. However, Paris fell in love with his beautiful wife, Helen, at first sight and took her out of the palace. The angry Menelaus and his brother Agamemnon, king of Mycenae, launched a campaign against Troy.

6. There are two ways to cultivate students' estimation consciousness. On the one hand, in the teaching process, we should consciously infiltrate the idea of estimation, let the students guess the mathematical laws with estimation, test the idea of solving problems with estimation, and test the result of solving problems with estimation, so as to run the idea of estimation through the whole teaching process and make the students strengthen the consciousness of estimation imperceptibly. On the other hand, let the students use estimation as much as possible to solve some problems closely related to life, and estimate according to the actual situation in life< 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, subtract, and seek quotient with pithy formula, students will continue to learn through the connection between knowledge. For another example, the methods of carry plus and abdication minus should be explained clearly, so that students can understand them thoroughly, so that they can correctly and skillfully use the method of calculation< 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
(1) cultivate students' habit of making drafts. It is a common phenomenon that students don't like to draft when they are calculating. The teacher assigned calculation problems, some students directly oral calculation, some in the book, table or other places, write one or two vertical, as a draft, these are bad calculation habits. Most of the calculation problems, except for a few students who can actually calculate the results directly by mouth, most students probably don't have this ability. In view of this situation, I ask the students to prepare special drafts and make them conscientiously. At the same time, I often go down from the platform to the students in class, and strictly urge the students to implement them. Over time, the students will graally develop this good habit
(2) cultivate students' good habit of careful writing and standard format.
students' habit of careful writing is usually formed. When students do questions, remind them to be careful, see clearly the meaning of the questions, see clearly the data provided by the questions, speak out the quantitative relationship according to the requirements of the questions, and correctly list the formulas for calculation, In the aspect of writing format, students are also required to be meticulous and answer questions according to the correct format. Make students form the habit of proofreading carefully. Students are required to proofread the copied questions carefully, from numbers and symbols, so as to make sure they are good. The checking methods I teach students to calculate are: one pair of copied questions, two pairs of vertical, three pairs of answers. The method of checking questions is to see and think twice. That is: first, look at the whole formula, which is composed of several parts, and think about how to calculate according to the general method; Let's see if there are any special conditions. Let's see if we can use a simple method to calculate. Do not blindly carry out simple calculation, avoid 15 + 5 × 5), which is wrongly calculated as 20 × 1 －0.5< In a word, in primary school mathematics teaching, the purpose of cultivating students' computational ability is not only to improve students' computational ability, but also to improve the development of students' thinking ability, lay the foundation for students' subsequent learning and the improvement of overall mathematical literacy, It depends on the clarity of students' calculation ideas and the rationality and flexibility of calculation methods. It depends on the formation of students' good learning habits and the continuous development of cognitive level. The key lies in Teachers' expectation, motivation, training and cultivation. Therefore, 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.

7. Oral calculation is a kind of calculation method which can directly calculate the number without calculation tools. It is an important part of computing power. In our daily life, we can say that there is no day without oral calculation, especially some simple decimal calculation. It is convenient, flexible and fast to calculate by mouth. Oral calculation is the basis of estimation and written calculation. Take 496 × 738=， In the vertical calculation, this multiplication problem used a total of 24 basic oral calculations! The poor ability of oral calculation will inevitably affect the accuracy and speed of estimation and written calculation, and affect the form of calculation skills. When students do oral calculation, they should not only listen, but also see, speak, but also calculate. In a sense, it is an organic combination of the four senses of ear, eye, heart and mouth. Oral arithmetic not only promotes students' thinking, but also develops students' attention, understanding, memory and expression ability. Therefore, to improve students' calculation ability, we must grasp the basis of oral arithmetic. Reading relevant books, I have gained some experience in improving pupils' oral arithmetic ability
1. Cultivate students' interest in oral arithmetic
"interest is the best teacher". In the teaching of oral arithmetic, we should also stimulate students' interest and make them happy to do so, so as to continuously improve the accuracy of oral arithmetic. For example, games, competitions and other forms can be adopted to arouse students' interest and improve their oral calculation ability
2. Enhance the students' perseverance in learning
mental arithmetic itself is relatively boring, and some students will have resistance over time. In teaching, we can introce the story of Chinese and foreign mathematicians to students. For example, Chen Jingrun, a famous mathematician in China, used several sacks of draft paper when he studied Goldbach's conjecture. By introcing the hard work of mathematicians, we can inspire students to love their motherland and mathematics, set up lofty ideals from childhood, enhance students' perseverance in learning, and cultivate their good quality of hard work
3. Cultivating students' good habits
good study habits is the guarantee to improve the accuracy of oral arithmetic. Therefore, we should try our best to correct students' learning attitude and cultivate their good learning habits. Of course, in teaching, we should pay attention to carefully analyze the students' personality differences according to the actual situation of the students in the class, correct the mistakes in time, effectively prevent the mistakes, and persistently do a good job in the teaching of oral arithmetic, which will graally improve the students' oral arithmetic ability
4
carry addition, abdication subtraction, in table multiplication and division within 20 should enable students to achieve the proficiency of "blurting out without thinking". 3-5 minutes of oral arithmetic training should be carried out every day. The forms should be flexible and diversified, and the training should be targeted, purposeful and planned in combination with the teaching content
5. Pay attention to the analysis of wrong questions
when students make mistakes in calculation, they must be guided to analyze the causes of the mistakes, find the root of the mistakes and correct them in time. For repeated mistakes, teachers can choose typical mistakes, organize students to observe, think, analyze and communicate with each other. Through collective "consultation", teachers can not only achieve the effect of "treating" but also "preventing" diseases. Usually,

8. Primary school as the stage of enlightenment ecation, the level of computing ability directly reflects the quality of a student's mathematics performance. In addition to the teacher's teaching, parents in improving their children's computing ability, might as well try the following methods
first, to strengthen the training of oral arithmetic is the key to improve the ability of calculation
oral arithmetic is the basis of all calculations. Only when children are proficient in oral arithmetic, can they have a good calculation ability. Therefore, parents may as well let their children insist on doing oral arithmetic every day. The content of mental arithmetic includes the mental arithmetic problems in this book and the basic mental arithmetic content learned before. Let the children practice it repeatedly. For example: let the child do 20 oral arithmetic questions every day, and set the calculation time for the child, and find the reason for the wrong questions, so that the child's calculation ability will be improved step by step
the addition and subtraction method within 10 in the first grade is very important, which is the premise of learning mathematics well in the future, and we must let children lay a solid foundation. Carry addition within 20, abdication subtraction, multiplication formula... These are the basis of future calculation. If you want to have a solid foundation, you must be very skilled, fast and accurate
Second, cultivate children's quality of care and patience, and develop the habit of serious and meticulous calculation
a large number of facts show that the lack of serious learning attitude and good learning habits is one of the important reasons for children's calculation errors. Therefore, to improve children's computing ability, we must pay attention to the cultivation of good computing habits, so that children have a rigorous, serious, meticulous learning attitude and the spirit of perseverance, the courage to overcome difficulties, do not use "a moment of carelessness" to forgive children's errors in calculation. So what habits should children develop in calculation
1. Cultivate the habit of serious examination. For practical problems, most of the children can seriously examine the problem, but for calculation problems, some children are not. In addition, the calculation is monotonous and boring, which is easy to cause psychological fatigue. If you encounter similar or similar numbers and symbols, you often have wrong operation order, wrong symbols or wrong data. When cultivating children's habit of serious examination, let them pay attention to the following three points: first, 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 then start to solve the problem
2. Cultivate the habit of careful examination. Check carefully and patiently, and check one by one. First, look up the number symbol, second, look up the calculation process. It can be summarized as the calculation habit of "one step, one turn back". In the calculation, one step, one turn back, one check. Check whether the numbers and symbols are copied correctly, whether the number is accurate, etc., and ask children to calculate patiently and carefully according to various corresponding calculation rules, so as to overcome the problem of carelessness
3. Cultivate the habit of standardized writing. Train children to be patient, not impatient, think seriously, and be cautious even when doing simple calculation problems. The calculation process should be written neatly and the format should be standardized. The calculation on the draft paper should also be written clearly to facilitate inspection. Pay attention to the standard of homework, let the children write according to the format, the handwriting is correct, not scribbled, not altered, not pasted, keep the homework neat and beautiful
4. Cultivate the habit of checking and estimating. This is the guarantee of correct calculation. Checking calculation is a kind of ability as well as a habit. First of all, we should master the methods of checking and estimating; Secondly, the checking calculation should be regarded as an important part of the calculation process; Thirdly, the child should master how to use estimation to test the correctness of the answer
Third, strengthen the family school contact, and jointly improve children's computing ability
parents should pay more attention to communicate with teachers to understand their children's learning situation in school, the accuracy of homework, and the problems in computing ability. Only with the joint efforts of parents and teachers can we get twice the result with half the effort
to improve children's computing ability, we need to be regular, planned and step-by-step, speed in time, density in quantity, flexibility and novelty in form and content. Only by persevering can we achieve good results.

9. 1、 Countermeasures
based on the above reasons, I have formulated corresponding measures to suit the remedy to the case and solve practical problems< To cultivate students' computing ability, teachers should first stimulate students' interest in computing and make them willing to calculate. I introce typical examples of Chinese and foreign mathematicians, create situations that students are interested in in in the teaching of calculation problems, and carry out calculation competition activities to stimulate students' interest in calculation, which has achieved good results. At the same time, the improvement of evaluation methods, such as group competition, personal bonus, and selection of "little computing experts", has really aroused the enthusiasm of students and made them have different feelings in the whole process of mathematics learning
2. Training oral arithmetic and improving calculation ability
oral arithmetic is the basis of written arithmetic, estimation and simple calculation. The speed and correctness of oral arithmetic directly affect the improvement of calculation ability. Only when the ability of oral calculation is strong, can the speed of written calculation be accelerated and the accuracy of written calculation be improved to the greatest extent
pay attention to the mastery of students' oral arithmetic methods. Such as: table division 56 ÷ 7 = () can guide students to think 7 × ＝ 56
keep on counting every day. There is a relationship between the speed of oral arithmetic ability and the density of training. After mastering oral arithmetic methods, the next step is to consolidate students' proficiency in oral arithmetic through continuous practice. I use two to three minutes before class every day to show 10 to 20 oral arithmetic questions. If the whole class do oral arithmetic or relay arithmetic together, pay proper attention to the guidance of oral arithmetic methods, or encourage students to practice oral arithmetic in their spare time every day. If I persevere, I can get very good results
3. Help students to understand the calculation theory and reveal the law
in the teaching of calculation, the most taboo way is to pay more attention to the results than thinking, and pay more attention to the rules than calculation theory. Let students understand the calculation theory and know not only what it is, but also why it is. 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, subtract, and seek quotient with pithy formula, students will continue to learn through the connection between knowledge. For another example, the methods of carry plus and abdication minus should be explained clearly, so that students can understand them thoroughly, so that they can correctly and skillfully use the method of calculation
4. Starting from daily life and cultivating calculation habit
good calculation habit is the premise and guarantee of improving calculation accuracy. Therefore, to improve students' computing ability, we must pay attention to the cultivation of good computing habits 1) 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 2) 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 3) 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 oral arithmetic should do oral arithmetic, while those who can't should do written arithmetic seriously, so as to strengthen the students' habit of standardized drafting. In column vertical calculation, the number of digits should be aligned, there should be an appropriate interval between the numbers, the carry number should be written in an appropriate position, and the number of exit points should not be less 4) Make students form the habit of checking calculation consciously. Teachers should teach students the method of checking calculation, and take checking calculation as an important part of the calculation process
5. Pay attention to estimation and cultivate ability
estimation can promote the formation of students' sense of logarithm, which plays an important role in the teaching of calculation. Teachers should consciously infiltrate the students' awareness and methods of estimation in the teaching of calculation. They can adopt the mode of "estimation calculation checking" to graally cultivate students' awareness and ability of estimation, so that the estimation can guide the later calculation
for example, when estimating 98 + 192, ask students to think about the sum of 98 and 192, which are close to several hundred respectively. After teaching, compare the correct result with the estimated result, so that students can understand that the estimated result should be very close to the correct result, which also plays the role of checking calculation
6. Pay attention to the analysis of wrong questions
students' learning is a process of repeated understanding and practice, and mistakes are always inevitable. Especially the junior students, because of their age characteristics, are easy to forget what they have just learned. For example, if the abdication is subtracted, the previous digit is subtracted by 1, and you forget to subtract 1 when calculating. Similarly, when we do carry plus, we forget to carry. In particular, the addition of continuous carry, subtraction of continuous abdication, forgetting to add or omitting to write are more errors, which are related to children's incomplete memory. Therefore, teachers should timely understand the problems existing in students' calculation, deeply analyze the causes of their calculation errors, and carry out targeted teaching
in order to better understand the students' learning situation, we can learn from the Chinese teacher's method of correcting compositions - writing comments. Add comments to students' mistakes to lead out the causes of mistakes, so that students can know whether the reasons are e to their carelessness, or which aspect of knowledge is not good enough. On the basis of knowing the mistakes, repeat the wrong questions, and deepen the understanding and consolidation of the correct knowledge again. 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 homework. Each student should prepare a book, write down the mistakes in the daily homework in the book, and write down the mistakes and correction methods. In addition, we should take the similar questions that students often make mistakes as the students' homework, and feedback again to understand the homework effect after students correct their mistakes
computing teaching is a long-term and complex teaching process, and it is not a matter of one day to improve students' computing ability. It is a long, troublesome, meticulous and long-term process. As the saying goes, "if you want to train a good skill, you must not be able to do it

10. Because of their weak mind, primary school students are deficient in cognition and thinking. In the process of primary school mathematics learning, we can clearly see their weak computing ability, and even some young students rely on hard Abstract memory instead of thinking and understanding when doing mathematical calculation. These deficiencies are the primary school mathematics teachers should pay attention to. Combined with practical work, this paper puts forward several methods to cultivate primary school students' computing ability
calculation accounts for a large proportion in primary school mathematics textbooks, especially in the lower grades. The level of students' calculation ability directly affects the quality of students' learning, because some concepts in mathematics need to be introced through calculation; The ideas, steps and results of solving practical problems in mathematics should also be implemented through calculation. It can be seen that students' computing ability is crucial. Therefore, to improve the students' computing ability, we should start from the lower grade students and train them seriously and strictly. Only in this way can we help to cultivate the students' mathematical literacy, the ability to solve problems, and the quality of being serious, meticulous, patient and fearless of difficulties
the author has been working in rural primary schools for more than 20 years and has been engaged in mathematics teaching in the lower grades of primary schools. I deeply realize that if children's computing ability is not strong, it will have a great impact on the overall mathematics performance, even affect their whole life. So in the usual teaching, we attach great importance to the cultivation of students' computing ability. So, how to cultivate children's computing ability? The author thinks that the training should focus on the following aspects:
1. Strengthen the training of oral arithmetic ability
require students to see each data and operation symbol in the topic clearly, determine the operation order, and choose a reasonable operation method The primary school mathematics syllabus points out: & quot; In order to cultivate students' calculation ability, we should pay attention to the basic training of oral calculation. Oral calculation is not only the basis of written calculation, estimation and simple calculation, but also an important part of calculation ability& quot; 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 school where I work will issue a mental arithmetic book every semester. The teacher should make full use of this book. 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 the students' calculation speed will be improved effectively. Oral arithmetic is not only to time, more important is to give children to see right and wrong, for those who can get full marks in the prescribed time to give a certain reward in time, cause students to pay attention to oral arithmetic, in addition to pay attention to oral arithmetic is a must do homework, usually adhere to such a work. Only in this way can we improve the ability of oral arithmetic
2. Set up a set of wrong questions for children
it's not terrible to have mistakes, and the acquisition of knowledge is based on the repeated correction of mistakes. When primary school students are prone to make mistakes, especially in the process of learning, every student will make mistakes, but we can clearly see the fact that good students are good at correcting mistakes, while poor students are not good at dealing with mistakes. Therefore, teachers should teach students to form the habit of correcting errors in time. We can suggest that students should reflect on the mistakes in their homework, let each student prepare a book, write down the mistakes in the daily homework in the book, and write down the mistakes and correction methods. In addition, we should take the similar questions that students often make mistakes as the students' homework, and feedback again to understand the homework effect after students correct their 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& quot; Correction & quot; We can't just be satisfied that the students can distinguish the causes of the mistakes, correct the mistakes, and achieve the preventive effect. We should ecate the students to correct the mistakes if they have any, and encourage them if they have no
3. Let students practice more and do more questions, practice makes perfect
Master skillfully & quot; Addition and subtraction within 10& quot; Addition and subtraction within 20 & quot& quot; Nine nine multiplication formula & quot;. 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 is two digit multiplication and division of two digits or two digit multiplication and division of three digits, or other more complex calculation problems, their basis is & quot; Addition and subtraction within 10& quot; Addition and subtraction within 20& quot; Nine nine multiplication formula & quot;. If these basic knowledge does not pass the test, it will not reach the level of blurting out without thinking. If & quot; Addition and subtraction within 10& quot; Addition and subtraction within 20 & quot& quot; Nine nine multiplication formula & quot; If you are not proficient in holding, you will not be happy and accurate in the middle and high grades. Therefore, teachers should make more efforts in teaching these basic knowledge. In addition to strengthening students' memory through repeated training, they can also use some vivid and interesting life examples and multimedia courseware to assist teaching, so that students can master these basic knowledge
4. Help students to understand the law of calculation
in the lower grade of primary school, students' understanding of numbers is not based on understanding, but on abstract and hard memory. So for primary school mathematics calculation, sometimes it is difficult to understand because of abstraction. Students often rely on repeated, intensive training to obtain the skills and ability of calculation, not on the basis of understanding and memory to obtain knowledge and methods. Therefore, in the teaching of calculation, we should let students understand the theory of calculation, not only know the nature, but also know the reason. 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, subtract, and seek quotient with pithy formula, students will continue to learn through the connection between knowledge. For another example, the methods of carry plus and abdication minus should be explained clearly, so that students can understand them thoroughly, so that they can correctly and skillfully use the method of calculation
5. Make students form the habit of proofreading carefully. The students are required to proofread the copied topics carefully, and they should have accurate numbers and symbols, so as to achieve good results.
good calculation habits will 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. In order to improve students' computing ability, we must pay attention to the cultivation of good computing habits. At the same time, those who can do oral arithmetic should do oral arithmetic, while those who can't should do written arithmetic seriously, so as to strengthen the students' habit of standardized drafting. In column vertical calculation, the number of digits should be aligned, there should be an appropriate interval between the numbers, the carry number should be written in an appropriate position, and the number of exit points should not be less. Make students form the habit of estimation and self-conscious checking. 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. We should let students understand that they will have to face many selection tests in the future. These tests are not only to test students' mastery of knowledge, but also to test their rigorous and meticulous study habits
the ancients said: & quot; It's better to teach people to fish than to teach them to fish& quot; A new round of curriculum reform also requires us to & quot; Teaching students to learn and cultivating their autonomous ability;, Therefore, we should improve students' learning and computing ability, seriously study, stimulate interest in learning, enlighten students' thinking, let students immerse themselves in the ocean of happiness, so as to achieve better teaching effect.