Incorrect force calculation
Publish: 2021-05-23 06:55:40
1. Compared with the old textbook, the amount of calculation practice in the new textbook has been greatly reced, and the difficulty has also been reced a lot. However, I feel that the students' computational ability has dropped a lot compared with the previous students, the computational ability is poor, the computational speed is slow, and the computational error rate is high! To this end, I think the following measures should be taken: first, adhere to the practice of oral arithmetic, often unremitting“ In order to cultivate students' computational ability, we should pay attention to the basic training of oral arithmetic, insist on regular practice, and graally achieve proficiency. " This is the requirement of mathematics curriculum standard. In my teaching, I organized teaching and training in a planned, step-by-step and purposeful way, such as listening to arithmetic, reading cards and oral arithmetic, reading questions and calculating silently, and repeatedly emphasized that the first is correct and then fast. 2、 Strengthen the basic knowledge and improve the ability of written calculation. In the teaching of calculation, oral calculation is the basis of written calculation, and written calculation is the key. Written calculation plays an extremely important role in primary school mathematics teaching. No matter how advanced the technology is in the future, the ability of written calculation is always a necessary ability for primary school students. 1. To enable students to understand the basic knowledge of mathematics and master skills is the primary condition for the formation of computing ability. Each calculation is based on the corresponding concepts, rules, properties, formulas and other basic knowledge. If students don't understand these basic knowledge correctly and master them thoroughly, they can't calculate. Only after students understand and master the relevant operation properties, laws and skills, can they apply these knowledge in specific calculation to seek simple and reasonable methods, improve the accuracy of calculation and speed up calculation. 2. Strengthening practice and skill training is the key to the formation of students' computing ability. For example, in the calculation of four items of scores, we often encounter the situation that some students' calculation rules are correct but the calculation results are wrong. The reason for the error lies in the basic skills such as approximate score, general score or mutualization; Another example is the division of decimals, especially when the divisor is a decimal. The mistake is that when the divisor becomes an integer, the divisor does not expand the same multiple at the same time, resulting in a wrong quotient. So we should strengthen the training of basic calculation skills in calculation practice. 3. Memorize common data, improve the calculation speed. In the four operations, if students memorize some commonly used data, it will not only help students to achieve the "correct and rapid" requirements, but also help students to better master the skills of calculation. For example: special data with sum and proct of whole hundred and thousand (for example: 75 + 25 = 100 + 25) × 4=100 125 × 8=1000 The proct of the approximate value of PI 3.14 with one digit and the proct with several common numbers 12, 15, 16, 25 and 36; The denominator is the decimal value of the simplest fraction of 2, 4, 5, 8, 10, 16, 20 and 25, that is, the interaction of these fractions and decimals. The results of the above numbers, whether in daily work or in real life, are used very frequently. After mastering and remembering them, they can be transformed into abilities and proce high efficiency in calculation. 3、 Carry out computing competition activities. For the boring calculation, students often deal with it casually after mastering the calculation method, resulting in more calculation errors. At this time, the proper development of some computing competition activities, often can better mobilize the students' learning initiative, improve the interest in computing, and achieve the purpose of improving the accuracy of computing. This semester, I plan to carry out two calculation competitions in the class, in order to improve the students' interest in calculation and improve the accuracy of calculation. After the competition, pay attention to sort out the students' mistakes, analyze and classify them, and then make targeted remedies, so as to clear the obstacles for improving the students' computing ability. 4、 We should encourage students to have a pleasant learning experience. Teachers should encourage students to make mistakes e to carelessness. In the usual homework correction, we should affirm its strengths, enhance self-confidence, put forward ardent hope, and urge it to correct its shortcomings.
2. The computing power bank of the tenth power has its own platform for server leasing, and has good server hardware resources. In other words, it has certain hardware resources to support computing power projects, so the tenth power bank itself has such hardware conditions to realize the concept of computing power bank: to provide more cost-effective computing power services.
3.
The distribution of minerals in the survival war game is not very obvious. If you want to dig iron ore, it is suggested that you take the necessary equipment and find a mine to start digging
there are four necessary tools for exploring a mine cave: spade, knife, torch and earth. When you encounter a permeable mine cave, you will feel happy that there are 40 pieces of earth in your tool bar. Then you just need to be careful, quick minded and pay attention to time, It's better to come out early than to die at home when it's dark. If you come out too early, do something else. You'll have a good time digging in the mine. I don't know the time. You'll pick up a pile of mines and be killed by wolves. All the mines will be finished
4. Fall in love with computing
if you want to do a lot of things well, you should first fall in love with such things, and so is computing. Generally speaking, people studying science have better computing ability, because they love computing more than others.
don't avoid things related to computing in life.
many people are used to asking people when they encounter computing, although it's very simple computing, because in their hearts, Their computing ability is very poor, and it seems faster to ask others, and the error rate is also reced accordingly. Some people directly take out a calculator or mobile phone, and think that it is more convenient and faster. Over time, their computing ability will only become worse and worse
think more about the topic of numbers
for example, a hotel opens, You can set a cost for it according to the number you predict, calculate how long you can recover the cost, or calculate how much money you can add to the account after three years of deposit in the bank according to the interest. After habitually calculating such problems, you will find that you have a concept of the number, And the computing ability will be greatly improved
4
master some computing skills
many people around me will not use computing skills, for example, I ask 99 × When 99 is equal to several, many people feel that they can't calculate it by oral calculation. In fact, this skill was often used in our primary school, but as we grow up, we graally forget these skills, such as converting to 99 × In addition, if I ask what is 55 + 56 + 57, many people really add one by one. In fact, they can quickly calculate 56 by simple multiplication × 3 on the line, a lot of calculation can use the above skills to calculate and transform, and really use up to rely on their own efforts
if you want to do a lot of things well, you should first fall in love with such things, and so is computing. Generally speaking, people studying science have better computing ability, because they love computing more than others.
don't avoid things related to computing in life.
many people are used to asking people when they encounter computing, although it's very simple computing, because in their hearts, Their computing ability is very poor, and it seems faster to ask others, and the error rate is also reced accordingly. Some people directly take out a calculator or mobile phone, and think that it is more convenient and faster. Over time, their computing ability will only become worse and worse
think more about the topic of numbers
for example, a hotel opens, You can set a cost for it according to the number you predict, calculate how long you can recover the cost, or calculate how much money you can add to the account after three years of deposit in the bank according to the interest. After habitually calculating such problems, you will find that you have a concept of the number, And the computing ability will be greatly improved
4
master some computing skills
many people around me will not use computing skills, for example, I ask 99 × When 99 is equal to several, many people feel that they can't calculate it by oral calculation. In fact, this skill was often used in our primary school, but as we grow up, we graally forget these skills, such as converting to 99 × In addition, if I ask what is 55 + 56 + 57, many people really add one by one. In fact, they can quickly calculate 56 by simple multiplication × 3 on the line, a lot of calculation can use the above skills to calculate and transform, and really use up to rely on their own efforts
5. So I'm similar to you, but our teacher teaches us to do 20 mental arithmetic every day, with a limited time of one minute. If you practice every day, your calculation will be OK
in addition, the calculation must be done carefully
1) don't rush to make a question.
2) force yourself to get used to it, look at every word of the question carefully from head to end, and force yourself not to use cleverness to evaluate the question and the following text. Be sure to look at it in order from head to tail.
3) don't use cleverness to rush to do it after reading it.
4) don't rush to make a question after reading it.
5) follow the requirements, Combine with the diagram, and then do it step by step.
6) don't be clever in mental calculation or jump steps, but do it step by step.
7) remember to check the calculation
in addition, the calculation must be done carefully
1) don't rush to make a question.
2) force yourself to get used to it, look at every word of the question carefully from head to end, and force yourself not to use cleverness to evaluate the question and the following text. Be sure to look at it in order from head to tail.
3) don't use cleverness to rush to do it after reading it.
4) don't rush to make a question after reading it.
5) follow the requirements, Combine with the diagram, and then do it step by step.
6) don't be clever in mental calculation or jump steps, but do it step by step.
7) remember to check the calculation
6. 1. Students generally feel that the accuracy of calculation will decline after they are separated from the scientific calculator
the inaccuracy of operation is largely e to the lack of deep understanding of basic concepts, the lack of thorough grasp of basic formulas and rules, and the lack of proficiency in their application. Therefore, in teaching, teachers should consciously and systematically equip some exercises without using calculators. When students are proficient in the application of concepts, formulas and rules, and their accuracy is guaranteed, they may as well use calculators again. The calculator as a learning aid, so as to liberate students from the operation, into the study of other problems
2. The effect of using calculator on flexibility
calculation should be reasonable, simple, skilled and fast, which requires students to be flexible in calculation and quick in thinking. The improvement of this ability requires students to observe and think about problems from many aspects, angles and directions. The scientific calculator can quickly solve the complicated calculation, if students blindly use the calculator, they will simply and mechanically input the data to solve, without thinking about how to solve the problem quickly and concisely. The lack of training in this area means that we have lost the effective way to improve our computing ability. I think we can have a class (or several classes) of using calculators to solve problems after a certain part of the content is finished. Before that, calculators are not allowed to be used. For example, in the seventh grade, some students use calculators to solve problems after adding rational numbers, and some use calculators after subtraction. It's better to finish the basic course, and then have calculators after students practice. Or, when encountering this kind of problem, such as calculating 18.75-15.39 + 1.25-14.61, students are required to solve it in a simple way, so as to consciously help students to calculate flexibly, reasonably and simply
3. The impact of using calculator on strictness
when using calculator, the calculation process is generally omitted. However, whether it is the usual requirements or the examination, the problem-solving process is required to be complete and standardized. In fact, this is the embodiment of the thinking process. Due to the lack of training in the use of calculators, the students' problem-solving is not standardized and complete, which is a serious defect and is very unfavorable to the improvement of students' mathematical thinking and mathematical quality
4. The influence of using calculator on mathematical thinking and psychological quality
operation plays a significant role in cultivating students' scientific way of thinking and forming good thinking habits and psychological quality. If students use scientific calculators excessively, they will be unwilling to spend time thinking and doing standard calculations, so as to engage in them rashly. As time goes by, thinking is not orderly and chaotic, and calculation is graally unfamiliar. In addition, we have formed the bad habit of carelessness and carelessness, and lack the training of will and perseverance. At the same time, some students are only used to one-way, single-level operation, used to forward calculation, not used to multi-directional, multi-level operation, not used to reverse operation. Without the scientific calculator, students have to pay attention to the direction and skills of calculation, so as to form the habit of looking ahead and looking after the whole situation. Through long-term training, students' mathematical thinking ability and confidence and perseverance are improved
the tradition of Chinese ecation attaches importance to the training of basic skills. Chinese students often have a solid foundation, and some American College Students' computing ability is not as good as Chinese middle school students. However, the advantage of basic skills of computing ability is less and less obvious for high school students nowadays. A senior high school mathematics teacher said: "many colleagues have such a feeling. Now, as soon as they go to senior one, they have to make up for the calculation for the students. Teachers and students feel that it's hard." A high school student's parents said: "because calculators can be used in the high school entrance examination, but they are not allowed in the college entrance examination, so my son should give up calculators first after he goes to high school. Because of his long-term dependence on calculators, his son doubted his ability of oral and written calculation, and was not at ease with the results of calculation. It's a waste of time. After more than a year, I finally gave up the calculator. " This kind of phenomenon is also the place that I feel puzzled. Why can I use calculator in senior high school entrance examination, but not in college entrance examination? How can students adapt to this change as soon as possible< In a word, with the rapid development of science and technology in the information society, the use of computers and scientific calculators is becoming more and more popular. How can we turn a blind eye to middle school mathematics? Can the field of mathematics ecation sit still? The use of calculators is no longer an economic problem, but an inevitable result of social progress and scientific and technological development. But the use of calculators also weakens the students' computing ability and affects the improvement of students' mathematical quality. We must guide students to use calculators reasonably. On the one hand, we should ensure the improvement of calculation ability, on the other hand, we should be able to operate calculators skillfully.
the inaccuracy of operation is largely e to the lack of deep understanding of basic concepts, the lack of thorough grasp of basic formulas and rules, and the lack of proficiency in their application. Therefore, in teaching, teachers should consciously and systematically equip some exercises without using calculators. When students are proficient in the application of concepts, formulas and rules, and their accuracy is guaranteed, they may as well use calculators again. The calculator as a learning aid, so as to liberate students from the operation, into the study of other problems
2. The effect of using calculator on flexibility
calculation should be reasonable, simple, skilled and fast, which requires students to be flexible in calculation and quick in thinking. The improvement of this ability requires students to observe and think about problems from many aspects, angles and directions. The scientific calculator can quickly solve the complicated calculation, if students blindly use the calculator, they will simply and mechanically input the data to solve, without thinking about how to solve the problem quickly and concisely. The lack of training in this area means that we have lost the effective way to improve our computing ability. I think we can have a class (or several classes) of using calculators to solve problems after a certain part of the content is finished. Before that, calculators are not allowed to be used. For example, in the seventh grade, some students use calculators to solve problems after adding rational numbers, and some use calculators after subtraction. It's better to finish the basic course, and then have calculators after students practice. Or, when encountering this kind of problem, such as calculating 18.75-15.39 + 1.25-14.61, students are required to solve it in a simple way, so as to consciously help students to calculate flexibly, reasonably and simply
3. The impact of using calculator on strictness
when using calculator, the calculation process is generally omitted. However, whether it is the usual requirements or the examination, the problem-solving process is required to be complete and standardized. In fact, this is the embodiment of the thinking process. Due to the lack of training in the use of calculators, the students' problem-solving is not standardized and complete, which is a serious defect and is very unfavorable to the improvement of students' mathematical thinking and mathematical quality
4. The influence of using calculator on mathematical thinking and psychological quality
operation plays a significant role in cultivating students' scientific way of thinking and forming good thinking habits and psychological quality. If students use scientific calculators excessively, they will be unwilling to spend time thinking and doing standard calculations, so as to engage in them rashly. As time goes by, thinking is not orderly and chaotic, and calculation is graally unfamiliar. In addition, we have formed the bad habit of carelessness and carelessness, and lack the training of will and perseverance. At the same time, some students are only used to one-way, single-level operation, used to forward calculation, not used to multi-directional, multi-level operation, not used to reverse operation. Without the scientific calculator, students have to pay attention to the direction and skills of calculation, so as to form the habit of looking ahead and looking after the whole situation. Through long-term training, students' mathematical thinking ability and confidence and perseverance are improved
the tradition of Chinese ecation attaches importance to the training of basic skills. Chinese students often have a solid foundation, and some American College Students' computing ability is not as good as Chinese middle school students. However, the advantage of basic skills of computing ability is less and less obvious for high school students nowadays. A senior high school mathematics teacher said: "many colleagues have such a feeling. Now, as soon as they go to senior one, they have to make up for the calculation for the students. Teachers and students feel that it's hard." A high school student's parents said: "because calculators can be used in the high school entrance examination, but they are not allowed in the college entrance examination, so my son should give up calculators first after he goes to high school. Because of his long-term dependence on calculators, his son doubted his ability of oral and written calculation, and was not at ease with the results of calculation. It's a waste of time. After more than a year, I finally gave up the calculator. " This kind of phenomenon is also the place that I feel puzzled. Why can I use calculator in senior high school entrance examination, but not in college entrance examination? How can students adapt to this change as soon as possible< In a word, with the rapid development of science and technology in the information society, the use of computers and scientific calculators is becoming more and more popular. How can we turn a blind eye to middle school mathematics? Can the field of mathematics ecation sit still? The use of calculators is no longer an economic problem, but an inevitable result of social progress and scientific and technological development. But the use of calculators also weakens the students' computing ability and affects the improvement of students' mathematical quality. We must guide students to use calculators reasonably. On the one hand, we should ensure the improvement of calculation ability, on the other hand, we should be able to operate calculators skillfully.
7. What is joint examination of finance? Joint examination of finance refers to the joint entrance examination for postgraates majoring in finance, which has been implemented in some colleges and universities since 2002. That is to say, candidates applying for master's degree of Finance in these colleges and universities all take part in the unified joint professional course examination. Since 2002, with the support and specific guidance of the Ministry of ecation and the joint efforts of various joint examination institutions, the joint entrance examination for master of finance has been smoothly implemented and continuously developed< 2. The purpose and basic requirements of the financial joint examination
the purpose of the financial joint examination is to: (1) standardize the scope, content and form of the financial postgraate entrance examination, and unify the difficulty of the examination questions
(2) increase the transparency of the entrance examination, attract more excellent candidates to apply for the master's degree in finance, and improve the quality of the students
(3) guide and standardize the undergraate teaching of finance, so that the level of teaching and scientific research of finance can reach a new level. The basic requirements of the joint examination are: to understand and master the basic concepts and theories of the fundamentals of Finance (including the principles of economics and Finance), to master and use certain qualitative and quantitative analysis methods, and to have a wide range of professional knowledge and strong ability to analyze and solve problems
3. Subjects and contents of the joint examination
the subjects of the joint examination are: Fundamentals of finance, which includes two parts: principles of economics and principles of finance
4. Method and time arrangement of joint examination
the examination is written and the examination time is three hours<
list of joint examination schools
Fudan University, Nankai University, Suzhou University, Zhejiang University, Liaoning University, Xiamen University, Zhongshan University, Jinan University, Hunan University, Shandong University, Nanjing University, Southeast University, Jiangxi University of Finance and economics, Shanghai University of Finance and economics, Zhejiang University of instry and commerce, Beijing University of Aeronautics and Astronautics Of
the purpose of the financial joint examination is to: (1) standardize the scope, content and form of the financial postgraate entrance examination, and unify the difficulty of the examination questions
(2) increase the transparency of the entrance examination, attract more excellent candidates to apply for the master's degree in finance, and improve the quality of the students
(3) guide and standardize the undergraate teaching of finance, so that the level of teaching and scientific research of finance can reach a new level. The basic requirements of the joint examination are: to understand and master the basic concepts and theories of the fundamentals of Finance (including the principles of economics and Finance), to master and use certain qualitative and quantitative analysis methods, and to have a wide range of professional knowledge and strong ability to analyze and solve problems
3. Subjects and contents of the joint examination
the subjects of the joint examination are: Fundamentals of finance, which includes two parts: principles of economics and principles of finance
4. Method and time arrangement of joint examination
the examination is written and the examination time is three hours<
list of joint examination schools
Fudan University, Nankai University, Suzhou University, Zhejiang University, Liaoning University, Xiamen University, Zhongshan University, Jinan University, Hunan University, Shandong University, Nanjing University, Southeast University, Jiangxi University of Finance and economics, Shanghai University of Finance and economics, Zhejiang University of instry and commerce, Beijing University of Aeronautics and Astronautics Of
8. In fact, bitcoin is stored in the bitcoin wallet. Bitcoin wallet is a kind of software complying with the bitcoin network protocol, which can be used to store, send and receive bitcoin.
9. Do you mean effective or safe<
according to the security level, the top is the most secure:
1, offline wallet
2, paper wallet
3, super long keyword brain wallet
according to the security level, the top is the most secure:
1, offline wallet
2, paper wallet
3, super long keyword brain wallet
10. Yes, there are banknotes. After changing the digital RMB, payment will be more convenient, so there will be some
its conceptual positioning is that digital RMB is legal tender in digital form. Another point is that it is equivalent to banknotes and coins. Digital RMB is mainly positioned at M0, that is, cash and coins in circulation.
its conceptual positioning is that digital RMB is legal tender in digital form. Another point is that it is equivalent to banknotes and coins. Digital RMB is mainly positioned at M0, that is, cash and coins in circulation.
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