Children's computing power

1. 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.

2. The mobile phone has fast and slow lens settings
however, we need to adjust it manually by ourselves. Turn on the camera of the mobile phone and slide it left and right to set it. Click the fast and slow camera to operate normally.

3. 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.

4. 1、 We should master the "addition and subtraction within 10", "addition and subtraction within 20" and "nine nine multiplication formula" skillfully. As the key starting stage, the elementary learning of addition, subtraction, multiplication and division will have a profound impact on students' further learning in the future, Any complex problem is composed of a simple problem. Whether it's two digit multiplication and division, two digit multiplication and division, three digit multiplication and division, or other more complex calculation problems, their basis is "addition and subtraction within 10", "addition and subtraction within 20" and "99 multiplication formula". These basic knowledge can't pass the test, and can't reach the level of without thinking If you don't master the "addition and subtraction within 10", "addition and subtraction within 20" and "nine nine multiplication formula" skillfully, you will not be able to calculate quickly and accurately in the middle and high grades. Second, strengthen the training of oral calculation ability. The "Primary School Mathematics Syllabus" points out that "to cultivate students' calculation ability, we should pay attention to the basic training of oral calculation, which is both written and written The basis of estimation and simple calculation is also an important part of calculation ability. "Only with strong oral calculation ability can we speed up the speed of written calculation and improve the accuracy of calculation. Our school will issue an oral calculation book every semester. Teachers should make full use of this book. The teaching content of lower grades is relatively less, and teachers can time children to do it in class, At this time, the students' attention is very focused, and it will also effectively improve the students' calculation speed. Oral arithmetic not only needs to be timed, but also more importantly, it is necessary to show the right and wrong to the children. Those who can get full marks within the specified time should be rewarded in time, so as to arouse the students' attention to oral arithmetic. In addition, it is necessary to pay attention to oral arithmetic in homework, Third, we should pay attention to the analysis of mistakes. Students' learning is a process of repeated understanding and practice, and mistakes are always inevitable. Especially for the younger students, because of their age characteristics, the knowledge they just learned is easier to forget. For example, if the former one withdraws one, they can forget to subtract one when calculating, 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, We can learn from Chinese teachers' method of correcting compositions - writing comments. We can add comments to students' mistakes and derive the causes of mistakes, so that students can know whether the causes of mistakes are e to their carelessness, or whether their knowledge is not good enough. The basis of knowing mistakes is to redo the wrong questions and deepen their understanding of the correct knowledge, Most of the students have done the wrong problem, the teacher will focus on the explanation, analysis of the reasons for the error; For students with poor foundation and often making mistakes, teachers should spend more time after class. Students should reflect on the mistakes in their homework. Each student should prepare a notebook to record the mistakes in their homework every day, and write down the mistakes and correction methods, It is necessary to take the similar questions that students often make mistakes as their homework, and then give feedback to understand the effect of correcting the mistakes. The practice of correcting the mistakes requires the students to judge the right and wrong, find out the mistakes, analyze the causes of the mistakes, and correct the mistakes, Let the students acquire knowledge in the competition. "Correcting mistakes" can not only satisfy the students to distinguish the causes of mistakes and correct them, but also achieve the preventive effect. Ecate the students to correct them if they have any mistakes, and encourage them if they have no mistakes. Fourth, help the students to understand the calculation theory and reveal the rules. In the teaching of calculation, let the students understand the calculation theory, not only the reason, but also the reason, The teaching of calculation will become lively and colorful. The intuitive thinking of the lower grade students is dominant, and they are graally transiting to the abstract thinking. Psychologists believe that the thinking starts from the action. In order to make the students master the mathematical knowledge and promote the development of thinking, we need to build a bridge between the image thinking and the abstract thinking of mathematics, In addition, we can make use of the students' existing knowledge and experience to understand the new knowledge, construct the main way of teaching knowledge structure, and properly use the old knowledge in teaching, Assimilating new knowledge by analogy and realizing the positive transfer of knowledge are concive to students' understanding of new knowledge and recognition of new cognitive structure. For example, adding and subtracting, formula quotient and so on are all students' continuous learning through the connection between knowledge. For another example, the methods of carry addition and abdication subtraction should be explained clearly so that students can understand them thoroughly, and then they can use the method of calculation correctly and skillfully

5. Buying exercises < br > students' poor computational ability is a combination of many factors. If parents want to improve their children's computing ability, they need to make them more diligent. Parents can buy some calculation exercises in the bookstore. Parents stipulate how many exercises their children should do every day. After that, parents should check in time< Br > the main reason for children's poor calculation ability is that they are lazy. After mastering the nine nine multiplication tables, the children do not practice the formulas of these tables, which leads to poor calculation ability. Students can only improve their computing ability through the day after tomorrow's practice< Br > do homework independently < br > some children will choose to use the computer when they encounter some difficult calculation problems. When parents find these problems, they should stop the children's behavior in time. No matter how difficult the calculation is, these children need to calculate by themselves. If it's beyond the children's ability, parents can teach these children how to calculate in advance< When children do homework, parents should play a leading role and supervise their children to finish homework independently. Some children in order to be able to quickly complete the homework, will search through the Internet to find the answer, and even some students copied other people's homework from childhood, parents need to stop these children's behavior in time< How can parents improve their children's computing ability? Parents need to find out why their children are poor at calculating. Some children are e to their lack of practice, some students do not master the correct method of calculation. If parents find out the cause of their children's poor calculation ability, they need to give timely guidance to these students, so that their children can learn the correct calculation method as soon as possible.

6. The training ways of operation ability are as follows:

1. Accurately understand and firmly grasp the concepts, properties, formulas, rules and some commonly used data required by various operations; The deep understanding of concepts, properties, formulas and rules directly affects the choice of methods and the speed of operation. The concept is fuzzy, the formula and the rule are ambiguous, which will certainly affect the accuracy of the operation. In order to improve the speed of operation, it is necessary to memorize some commonly used data. For example, the square of natural number within 20, simple Pythagorean number, special trigonometric function value,,,,, LG2, Lg3, e accurate to approximate value of 0.001, etc< Second, master the general methods and rules of operation, and flexibly use concepts, properties, formulas and rules for operation. Teachers can combine the content of teaching materials, compile and collect some flexible exercises, cultivate the flexibility of students' calculation, and guide students to collect, summarize and accumulate experience to form skilled skills, so as to improve the simplicity and rapidity of calculation< Third, pay attention to the typical demonstration of teachers and examples, and make clear the goal of solving problems, the steps of calculation and the basis. Through the typical demonstration, the transition from understanding knowledge to application knowledge is relatively smooth, thus forming the computing ability< The essence of mathematical operation is to dece the result from the known data and formula according to the definition and properties of operation, which is also a process of reasoning. Whether the operation is correct or not depends on whether the reasoning is correct. If the reasoning is not correct, the operation will be wrong. We should pay special attention to the equivalent transformation in operational reasoning< 5. Pay attention to the training of the ability of identity transformation of number and form

1. Sign transformation, for example, sign transformation when removing brackets and adding brackets

2. Reciprocal transformation, such as addition and subtraction, multiplication and division, power and root, differential and integral, etc

3. For example, A2 + B2 = (a + b) 2-2ab, etc< For example, given X-Y = 3, Y-Z = 5, finding x-z can decompose x-z = (X-Y) + (Y-Z)< For example, introcing auxiliary elements, constructing auxiliary functions, adding auxiliary lines, adding parameters and so on< Sixth, strengthen the operation practice. Any ability is formed and developed in certain practical activities. In order to effectively improve the students' operation ability, we must strengthen the practice. The practice should be purposeful, systematic and typical. Through changing, changing, solving and using one question, we can cultivate the proficiency, accuracy, flexibility and organization of calculation. In the form of question group training

7. First, pay attention to listening. In the classroom, teachers generally teach new knowledge content, so we should follow the teacher's ideas, actively carry out their own thinking, see what is different between the teacher's problem-solving ideas and what they think, and further improve their mathematical ability through thinking< Second, review in time. When reviewing, we should digest what the teacher said that day, so as not to accumulate problems. We should review what the teacher said in class, master the reasoning process of formula, and try to review it through our own memory. If we can't understand it, we should turn over the book

Third, do more questions. To learn mathematics well, we must do more problems. This is to master the solution ideas of different types of problems. At the beginning, we can start with simple problems, mainly focusing on the exercises in the textbook. If the exercises in the textbook can be solved well, it is to lay a solid foundation

when the basic knowledge is solid, you can find some extracurricular exercises or test questions to practice, help yourself to develop thinking, find new ideas, and improve the ability to analyze problem-solving. If you do more questions, you can know more or less the rules of problem-solving, and summarize a set of your own methods of problem-solving

Fourth, ask if you don't understand. When you study, you will encounter some problems that you are difficult to solve. At this time, you should actively ask questions and discuss. Don't hold back or skip the problems because you are afraid of timidity. This will only cause hidden dangers in your study

for those more difficult questions, you can ask the teacher or discuss with other students, and you may learn good methods and skills from others. We should know that the basis of learning is diligence, and the key to learning is easy to ask.

8. 1、 Strengthening 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
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
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.