As for how to calculate, first, we must master the method of dialing beads in mental arithmetic. Whether the method of dialing beads is correct or not will directly affect the operation speed and correct rate of mental calculation of beads. Basic skills, that is, picking pearls, listening, watching, beading and memorizing.
Second, we should master the basic arithmetic of abacus mental arithmetic, that is, the basic arithmetic of addition, such as: 2+ 1, 2+5, 2+6, 3+4, 4+8, 7+5, 8+4, 6+8; The basic subtraction algorithms are: 3- 1, 7-5, 8-6, 7-4, 12-8, 12-5, 12-4, 14-8.
Third, we should do proper exercise. To learn abacus mental arithmetic, besides mastering basic skills such as dialing beads, listening to numbers, watching numbers, drawing pictures and memorizing, and mastering basic arithmetic algorithms, you need to strengthen your practice. However, we should also pay attention to the scientific nature and the amount of practice.
Landlord, please accept it. Typing is very tiring!
Question 2: What is abacus mental arithmetic? "abacus mental arithmetic" is the abbreviation of abacus mental arithmetic, also known as abacus mental arithmetic. It is a calculation skill based on abacus calculation, based on actual training, simulation training, then image training, and finally the movement of beads in the brain to calculate. More vividly, it is to use an abacus in your mind, from relying on counting beads to getting rid of counting beads.
Practice has proved that in the teaching process of abacus mental arithmetic, children's hands, eyes, ears and mouth not only cooperate and coordinate with each other, but also use image thinking and abstract thinking alternately in the left and right hemispheres, which is very beneficial to the development of children's intelligence. In the training of playing, watching and listening, children should be made to move regularly, accurately and quickly.
Question 3: What is abacus mental arithmetic? How to calculate? Hello, the following function reference, I wish you happiness. Through the rules of abacus calculation, the method of calculating by using beads in mind is abacus mental calculation, which is referred to as "abacus mental calculation".
Abacus mental arithmetic is carried out in two steps, one is to learn abacus, and the other is to form "abacus" in the brain, that is, to establish a bead image. Through these two steps, you can form a quick and accurate mental arithmetic ability.
The key period of establishing brain image is 4~ 12 years old, which is the advantage for children to learn abacus mental arithmetic. According to the characteristics of children's growth and development, cartoon abacus mental arithmetic is based on the principle of "interesting first, then effective", which visualizes abstract concepts by cartoon means, visualizes and concretes monotonous calculation, makes children happy to participate, and invisibly achieves deep memory and habit of using, which embodies "playing".
Abacus mental arithmetic is the abbreviation of abacus mental arithmetic, which can also be said to be an abacus in the mind.
Mr. C. Harahara said: "The result obtained by intuition without relying on anything is called conceptual mental arithmetic." We can call the calculation in written form, rather than the calculation written on paper, mental calculation in written form. On the other hand, mental arithmetic based on abacus is called abacus mental arithmetic.
Abacus mental arithmetic is based on the number of 1 to 9, and is calculated according to the image of abacus mental arithmetic. Therefore, when digital images also appear in the brain, the images grasped by vision or touch are simple and clear, and the numbers are recognized as concrete objects (abacus calculation), which is more suitable for children to master mental arithmetic. Moreover, because the practice of abacus has become a preparatory practice of mental arithmetic, it will not take long for the practice of abacus mental arithmetic to be successful.
1. What is Xu Sizhong's heart?
In layman's terms, it is to use abacus in your head. The remarkable feature of Xu Sizhong's mental arithmetic is that children can get rid of abacus and enter the mental arithmetic state after learning a lesson, and everyone can learn it.
2. How old is the best child to learn Xu Sizhong's mental arithmetic?
Children above the middle class. From the physiological and psychological point of view, children in this age group mainly think in images. Abacus mental arithmetic is a fast mental arithmetic method that uses the spatial imagination and image reproduction ability of the brain to transform abacus and its pearl picking process from physical and physical movements into thinking and pearl picking operation in the brain. After puberty, we will lose the best time to develop our children's potential.
3. What are the benefits of children learning Xu Sizhong's mental arithmetic?
It can improve children's computing ability, develop children's thinking ability, enhance children's memory ability, cultivate children's innovation ability, develop children's imagination ability and enlighten children's observation ability.
Abacus mental arithmetic education conforms to the scientific principles of modern pedagogy, psychology and physiology: first, abacus mental arithmetic, as a rational and intuitive object, plays a bridge role in the formation of children's mental arithmetic skills, such as the transformation of information coding form, the understanding of carry concept and the improvement of calculation ability; Secondly, as the psychological mechanism formed by intellectual skills in stages, the meanings of words and symbols are constantly strengthened through images, and the images themselves are also constantly strengthened; Third, the abacus mental arithmetic process is an information processing mode flow, which needs to use vision, hearing and kinesthetic, which is conducive to the coordinated activities of the left and right hemispheres of the brain.
4. Will children learn Xu Sizhong's mental arithmetic affect primary school mathematics learning?
No, Xu Sizhong's Mental Arithmetic is arranged and written according to the principles of primary school mathematics teaching, and its style and language are basically the same as those of primary school mathematics now. Children's study of Xu Sizhong's mental arithmetic will not only affect their study of primary school mathematics, but also promote their study of primary school mathematics and other courses.
5. Do children have to use their mouths to learn Xu Sizhong's mental arithmetic?
You don't need any formula. Xu Sizhong's abacus mental arithmetic abandons the original complex formula method in abacus mental arithmetic teaching, and teaches children to learn abacus mental arithmetic according to mathematical principles and internal laws of abacus mental arithmetic.
6. Do children need to be accompanied by their parents when learning Xu Sizhong's mental arithmetic?
No need. Xu Sizhong's mental arithmetic textbook is concise, catchy and readable. Children can read and learn by themselves, and they don't need their parents to accompany them when teaching.
7. Does it take a lot of practice to learn Xu Sizhong's mental arithmetic?
There is no need to do a lot of exercises. Xu Sizhong does mental arithmetic, not crowd tactics. The design of exercise questions is based on children's cognitive rules and learning rules, from shallow to deep, step by step.
8. What kind of calculation level can children achieve after learning Xu Sizhong's mental arithmetic (six volumes)?
Every child can easily learn the contents of Xu Sizhong's Mental Arithmetic (six volumes), and his mental arithmetic ability can reach the calculation level when he graduated from primary school, paving the way for primary school mathematics learning. ...& gt& gt
Question 4: What is the highest state of mental arithmetic? The Unity of Man and Pearl
Question 5: What does mental arithmetic mean? 1. concept
Abacus mental arithmetic is also called abacus mental arithmetic or abacus quick calculation. Abacus mental arithmetic is a method of turning numbers into abacus beads in your mind for calculation. It is developed on the basis of abacus calculation. At present, it is very popular in Southeast Asia, and Taiwan Province Province, Singapore, Malaysia, South Korea and other places have mushroomed to set off a wave of mental arithmetic. In recent years, abacus mental arithmetic will set off a new research upsurge in Chinese mainland.
The mental arithmetic ability of abacus comes from brain images, and children themselves can actually feel the improvement of mental arithmetic ability. Therefore, abacus and mental arithmetic have stimulated children's thirst for knowledge from one digit to multiple digits. Through abacus mental arithmetic training, children can not only learn a special and beneficial calculation method, but also cultivate good study habits, inspire brain intelligence, strengthen thinking ability in images, communicate left and right brains, and make the development of the whole brain tend to be balanced and coordinated, thus being more creative.
Beginners learn abacus consciously, and then they can do it unconsciously and automatically. Anyone can do it. Then according to the image of the abacus, draw it in your mind and start practicing mental arithmetic. Through years of practice, it has been proved that learning abacus mental arithmetic at the age of 4-5 is the best. The general limit is about 10 years old, and once the brain image disappears, it cannot be regenerated.
Preschool children not only don't understand the concept of number, but also have no impression of number. In order to let children understand the concept of number, it is necessary to use special tools such as abacus as teaching AIDS. If you teach them abacus, it is easy to produce abacus images, but as they get older, they will produce their own digital images. Teaching them abacus mental arithmetic at this time is easy to cause confusion, so it is ideal to learn abacus mental arithmetic from an early age.
2. Origin
The mind is an activity of calculating numbers through thinking. It is a calculation in the brain by using the abacus representation as the carrier and the abacus rules. Since humans began to have the concepts of numbers and numbers, and can calculate the simplest numbers, there has been mental arithmetic. In order to assist mental arithmetic, the calculation tool of "taking things near and taking things far" appeared, and stones, branches and so on are also the most primitive calculation tools for taking things far.
Then, the calculation tools and corresponding algorithms such as calculation, abacus calculation, pen calculation and computer calculation were invented. The calculation speed and accuracy of modern electronic computers are unprecedented and unparalleled. However, no matter how to use any kind of calculation, it needs the participation of the human brain. In other words, the calculator was invented to assist mental arithmetic and improve the level of mental arithmetic. However, calculators can never replace the human brain and mental arithmetic. Social development needs more and more high-quality and intelligent talents.
If abacus mental arithmetic is used to develop and strengthen children's intelligence, more talents can be cultivated according to children's personality. If children can make good use of their natural intelligence, the psychological training function of mental arithmetic will shine brilliantly.
3. Brain images
Abacus mental arithmetic is to draw an abacus in your mind and form a brain image. Developing brain images is one of the ways to develop human wisdom, and it is a new thing. Brain mapping is a discipline, which refers to the perception of the past, although the scene at that time can be clearly recalled many years later. This knowledge of children is innate. After adolescence (usually after 10), this brain image will disappear from most children. Brain image talent constantly flows in the depths of the soul and becomes the driving force of learning and art. In this sense, the original intention of education can be understood as "bringing out the original things".
4. Features
Abacus mental arithmetic is to use abacus as a calculation tool and use the effect of brain image to calculate. Operating specific tools is most suitable for the concept of cultural number. The mind depicts the image of an abacus in the brain. The reason why it manipulates images is due to the role of brain images and unconsciousness. The process of gaze-concentration-unconscious memory is the same, and its characteristics are as follows:
(1) Easy to use
Abacus mental arithmetic has been sublimated from learning to use abacus to brain image, which is not limited by time and space.
(2) Fast speed
It is recognized that abacus mental arithmetic is faster than abacus and calculator, which can be confirmed by experiments and practice. Brain frequency > bead frequency > mouth frequency > key frequency > pen. At present, the brain frequency of abacus mental arithmetic players has reached 10- 1 1 times/second (ordinary people are 1.2- 1.5 times/second). Today, people need this kind of high-speed response.
(3) It has the function of enlightenment and education.
Abacus mental arithmetic transforms abstract thinking into image thinking, and alternately uses image thinking and abstract thinking for calculation, which is the development of > >.
Question 6: When is the best time to start learning abacus mental arithmetic? It's a little early for the middle class to learn abacus, and the big class just happened last semester.
The answer upstairs is not accurate enough. Kindergarten, if it is a large class teaching, abacus is impossible to reach the standard. Generally, there are no more than 25 teachers in a class, including a lecturer and an assistant trainer. Judging from your answer, it seems that children recite formulas, like children's songs, remember them firmly and speak quickly, but they don't know how to use them. Doing mental arithmetic is like making judgments, and the correct rate is low. Regarding the teaching of teachers, there is a very important teaching link, omitting the distinction between -5 and 10, and there is no fundamental difference between children's brain images. It will take the child a week or so. Try to do less mental arithmetic and do more abacus calculation during this period. Let her count the beads. When there are enough beads in one stall, she doesn't need to ask other stalls for help. Of course, she uses 5, and only uses 10 when there are not enough files. I wonder what your daughter is up to. If it's a five-ball 15 file, you can leave a message, which is the general abacus of the banking industry. Maybe I can help you solve this problem.
In the addition and subtraction of the last two digits, there is also the integration of abacus mental arithmetic and vertical mathematics in primary schools, which is particularly important in the teaching process. Omitted. After children go to primary school, they don't know which method to use to do the problem for a while.
Question 7: What are the advantages of abacus mental arithmetic? Long-term teaching practice has proved that children who have learned abacus mental arithmetic can play the following roles:
1, the computing power is obviously enhanced. After training for one and a half hours a week, after one year, children will be able to add and subtract 2-3 digits.
2. Enhance spatial memory. By translating beads, children's visual spatial intelligence is obviously improved.
3. Attention has been obviously improved. By listening (watching), dialing and speaking, children exercise the coordination ability of the five senses, that is, improve their attention.
This understanding has been further strengthened. The use of diversified training methods, teacher-student interaction and game-based teaching have protected and developed children's epiphany and imagination.
5. Self-confidence and willpower are obviously improved. Classroom teaching pays attention to guiding children's performance, emphasizing appreciation education and longitudinal comparison education, as well as excellent performance among children of the same age after learning abacus, so that children can constantly feel progress and success, and further improve their self-confidence and perseverance.
6. Work is planned and purposeful. As one of the teaching contents, children's self-cognitive intelligence has been significantly improved through teacher-student agreement and classroom rewards.
Question 8: At what age did children start to learn abacus mental arithmetic? Let's first understand the learning process of children's abacus mental arithmetic:
( 1)
1. Know the abacus, know the names of each part, learn the posture of the abacus and the correct method of holding the pen.
2.0~ 10 understanding, disk diagram, pearl image diagram, fingering learning, pearl thinking, composition decomposition.
3. Direct addition and direct reduction:
Practice on the abacus first, add and subtract 3~6 strokes of a number.
One-digit analog mental arithmetic
Two-digit analog mental arithmetic
Three-digit 2~3 different numbers are not added or subtracted.
(2)
1. If it is full, add five, and if it is broken, subtract five (the next five is rounded off, and the last five is rounded off), master the concept of making up the number (two numbers add up to five, which is called making up the number), and practice mental arithmetic on the abacus.
2. Add and subtract to give way and master the concept of complement (two numbers add up to 10 is complementary,) abacus mental arithmetic.
(3)
1. If you break the 5-digit addition, you will lose 5 when you abdicate.
2. Break the five-digit addition, abdicate more than five, and subtract the mental arithmetic.
3.3~5 mental arithmetic of adding and subtracting two digits
Let's talk about the advantages and disadvantages of learning abacus mental arithmetic:
Excellent: 1. It is beneficial to improve memory ability and cultivate attention. The speed and accuracy of abacus mental arithmetic depend on the length of time and the depth of traces in the brain. 2. It is beneficial to improve computing skills.
Disadvantages: 1 The classroom atmosphere is rather dull, it is difficult for children to calm down and there are few teaching AIDS. 2. Children do not have a good grasp of the concept of quantity and the combination of quantity and number. 3. Because abacus mental arithmetic is based on skilled abacus mental arithmetic, and then a quick algorithm of conditioned reflex is formed, and the result is obtained directly through mental arithmetic, so to learn abacus mental arithmetic well, we must first master abacus mental arithmetic skillfully. This will make some children who can simply add and subtract mental arithmetic, because they can't do mental arithmetic skillfully and can't form mental arithmetic pictures in their minds, so they can't do mental arithmetic. My suggestion is:
1. Mental arithmetic is boring to learn, and it is difficult for children to sit still. Parents need to review exercises after class, otherwise the course can't keep up. The course of abacus mental arithmetic is closely related. If you don't master the last class, you won't be able to keep up with the next class, resulting in a vicious circle.
2. It is difficult for children who have learned addition and subtraction to get rid of the original mathematical concepts and imagine the abacus of abacus calculation. This will bring great disadvantage to learning abacus mental arithmetic, and parents will not understand whether he has an abacus in his mind when doing simple arithmetic. When it comes to increase or decrease, it's too late to know that he doesn't have an abacus in his heart, or to use past experience to calculate.
3. The difference between mathematics and abacus mental arithmetic: It is more interesting to learn mathematics, but the practice between classes is not particularly important. Its teaching system is helpful for children to establish abstract logical thinking ability, give them some preliminary mathematical knowledge and skills, and develop their intelligence. Various teaching methods can be used to cultivate children's interest in mathematics, but these may not be obvious to parents at this stage, unlike children who can quickly calculate and add and subtract multiple strokes after mental arithmetic is completed. Both of them have different teaching objectives and effects.
It is best not to learn abacus mental arithmetic.
What is abacus mental arithmetic? It is to set up an abacus in children's minds and turn abstract calculations into beads on the abacus of images.
After mental arithmetic, children can easily calculate the addition and subtraction of hundreds of digits. But what I want to ask is
1. What is the purpose of children's mathematics and science education?
2. What is the practical significance of letting children learn to calculate the addition and subtraction of percentiles?
3. The addition and subtraction of one percent can be calculated by abacus mental calculation, and the relationship between quantity and quantity can be clarified, and whether the transformation process can be equivalent.
4. Does mental arithmetic cultivate talents or stifle creative talents?
Through mathematics learning, children can understand the meaning of quantity, the relationship between quantity and quantity, and the conditions and process of transformation between quantity and quantity; Understanding the abstract concept of numbers can distinguish the connection and difference between abstract concepts and entities. Can understand the principle of abstract symbol system and know the relationship between symbols. Children's mathematics education is to guide them to distinguish their similarities and differences from various entities, sum up a vague image from the characteristics of some entities, such as the same color, the same hardness, the same side and the same size, and then clearly turn it into an abstract concept. Then guide them to establish the relationship between entity and this abstract concept, and guide them to understand the relationship between these concepts. This is the study that can best train people's comparative analysis, induction and generalization, and logical reasoning ability in early childhood.
But abacus mental arithmetic is only a solid entity calculation model, what can it do? > & gt
Question 9: What is abacus mental arithmetic? Mental arithmetic is also called "oral arithmetic". One of mathematics teaching methods. A calculation method based on thinking and language activities without any tools. There are two kinds of calculation methods: daydreaming calculation and quick mental calculation, which are really synchronized with primary school mathematics textbooks. The arrangement and difficulty of the textbook "Fast Mental Arithmetic" is a fast calculation that closely follows the syllabus of primary school mathematics and integrates with junior high school algebra, which is simpler than the primary school textbook. Simplify written calculation and strengthen oral calculation. It is simple, easy to learn and interesting. After a short period of training, primary school students can write answers directly by adding, subtracting, multiplying and dividing, not vertically. Fast mental arithmetic is different from abacus mental arithmetic and palm mental arithmetic. The fast mental arithmetic invented by Niu Hongwei, a teacher in Xi 'an, mainly trains children to do addition, subtraction, multiplication and division quickly through certain rules in textbooks. "Quick mental arithmetic" is helpful to improve the order, logic and sensitivity of children's thinking and behavior, and train children's eyes, hands and brain to react synchronously and quickly. The calculation method is consistent with mathematics in primary and secondary schools, so it is very popular with parents of young children. Listening refers to the training mode in which teachers or parents dictate questions, students listen to mental arithmetic, and then write or dictate answers. When listening and calculating, we should keep the calculation process and the calculation results of intermediate links in memory for a short time, which is of great significance to the development of instantaneous memory. At the same time, listening and calculating are also effective training methods to promote students to compress their thinking steps. Listening and calculation training not only increases the practice density in the classroom by limiting the time for setting questions. But also make students' thinking in a state of high tension, which can exercise students' agility and psychological quality. Listening and calculating once a day is an effective mental exercise in mathematics. Therefore, there is still a difference between oral calculation and listening calculation.
Question 10: How is mental abacus calculated? The formula to teach you mental arithmetic is the fastest.
Mental arithmetic | mental arithmetic | oral arithmetic | abacus calculation
Many parents have always been concerned. If you want to learn primary school mathematics well, you must be good at mental arithmetic. Good mental arithmetic, very good, and college entrance examination, senior high school entrance examination, draft paper can save a lot. For example, I learn mental arithmetic. For example, how can I save draft paper if I learn mental arithmetic well? The primary school is teaching the fourth and fifth grades, a group of two boys and five girls. What percentage of boys make up the whole group? Accurate to five decimal places, do you know what percentage it accounts for? The first column, this is an application problem, the problem is repeated, and if the problem is not repeated correctly, it must be done wrong. What did I just say, a combination of two boys and several girls? (5) Children answer questions best, are smart and repeat correctly. You will be very good at doing application problems in the future. Two boys and five girls, so what's my question? What is the percentage of boys in the whole group? How to list the numbers? The most standard formula is 2 divided by 2 plus 5, which accounts for a few percent of the total number of boys and girls. It is equal to two divided by seven, and the child will do well in mental arithmetic. Come on, what time is it? Is it five, two, seven, fourteen, six divided by seven? Eight, seven, eight, five, five divided by seven, how much is left? There are seven left. How much is seven seven forty-nine to one? One divided by seven equals one. Three four seven two eight. How much is left? There are two left, and then what? Eight. A little, no matter how much. What was my question just now? Accurate to several decimal places? Five digits, but what's my question? What percentage? Listen carefully. What percentage is it equal to? Equal to 28%, the last few. 57 142 has five digits after the decimal point, right? The accuracy is about equal to, but here it should be, one into three. This is the end of a question, so why am I so sure to do this mental arithmetic here? Because I use the finger algorithm, a finger, not a finger, can be equivalent to the power of an abacus with ten fingers in one hand. This is a mental arithmetic method that I will introduce next. The calculation method of mental arithmetic is very simple at first, so don't use other tools. It's just your own hand. Then what? The principle is to use one hand as an abacus, and one hand represents a gear of the abacus. How to express it? Do it with me. One, stretch out your right hand and index finger neatly. One, two, three, four, five. This is the abacus, understand? I've been talking about abacus for so long. What about six, seven, eight, nine and ten? How about holding out your left hand? Ten, is this called ten? Put away nine and take out ten. That is ten. Eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen, twenty. This little brother and sister are very powerful. Twenty-one, twenty-two, twenty-three and twenty-four, right? 25, 26, 27, 28, 29, 30. Put away these nine, thirty. Thirty-one, thirty-two, thirty-three, thirty-four, thirty-five. The child has three fingers in the middle. That's good. What about thirty-five, thirty-six, thirty-seven, thirty-eight, thirty-nine and forty? Remember to put away ninety and forty. 44, 4, 55, 66, 77, 88, 99, 100 on both sides. What about a hundred? Whether there is one nearby or not, children will imagine if they practice more, and they will know if they have seen one hundred. Anyway, this means one bit, and when this means ten bits, these two are 0, and there is a 1 next to it. It doesn't matter. If it really doesn't work, lend him your hand. You got it? People are alive, that is to say, there are at least thirteen units in the abacus, and thirteen hands cannot be put. When a hand grows, cut it off. What does hand mean? A petty thief calls three hands. Then we use two hands. God made us like this. It must be perfect. I believe, because these two hands can represent infinite numbers.
Let's look back at this problem. Two divided by seven, what did I just compare? Two. How about two divided by seven, 27 14? What do you think I showed? It's six o'clock. I represent the rest. What is my balance? It's 0.6 now. Then, seven, eight, five, six, is it sixty MINUS fifty-six? I compared the percentile and then the thousandth. You got it? Movable, such as 469 plus 110, how can I add it if I have to express it by hand? 469 plus 110 equals 579. I won't show you the numbers, because I remember 9 plus 0. Because as soon as I saw this zero, I remembered it. That's it. How to avoid comparing the digital hands of this abacus with the fast finger algorithm? In other words, the hand means ... >>