1 quick calculation 1: quick mental calculation, quick calculation.
Fast calculation 1: fast mental arithmetic-a teaching mode that is really synchronized with primary school mathematics textbooks.
The quick center is the only way to perform simple operations without any physical objects, and it is not necessary to practice abacus, wrench fingers and abacus.
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.
Special effect of quick mental arithmetic
I have learned all the multiplication, division, addition and subtraction of any multi-digit number above grade three.
Addition and subtraction of high two digits, multiplication of two digits, division of one digit.
First grade, multi-digit addition and subtraction.
Kindergarten large classes learn multi-digit addition and subtraction, tailor-made for preschool children, and pass the primary school oral calculation in advance. It is helpful for children to learn mental arithmetic quickly in kindergarten to go to primary school in the future.
Children no longer use draft paper to do their homework, but write answers directly.
Fast mental arithmetic is different from abacus mental arithmetic and palm mental arithmetic. Fast mental arithmetic invented by Xi 'an teacher Niu Hongwei. (Teacher Niu Hongwei obtained the patent certificates issued by People's Republic of China (PRC) and China National Intellectual Property Administration. Patent number; ZL200830 1 174275。 Protected by the Patent Law of People's Republic of China (PRC). ) mainly through certain rules in textbooks, children are trained to perform fast operations of addition, subtraction, multiplication and division. "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.
Fast mental arithmetic teaching mode that is really synchronized with primary school mathematics textbooks;
1: learning algorithm-written arithmetic training. At present, China's education system is exam-oriented education, and the standard for testing students is exam transcripts. Then the students' main tasks are to take exams, answer questions and write with a pen. Written arithmetic training is the main line of teaching. Consistent with the mathematical calculation method in primary schools, it does not use any physical calculation, and can be used freely horizontally and vertically, even adding and subtracting. Computing with a pen is the golden key to opening an intelligent express train.
2. Clear the math-math battle. Being able to write questions with a pen not only helps children understand arithmetic, but also helps them understand it. Let children understand the calculation principle and break through the calculation of numbers in spelling. The child completes the calculation on the basis of understanding.
3. Practice speed-speed training, it is far from enough to use a pen to calculate problems. There should be a time limit for oral calculation in primary schools. It takes time to tell whether it is up to standard, that is, there are not enough calculation problems, mainly to speed up.
4. Enlightenment wisdom-intellectual gymnastics is not a simple study and calculation, but focuses on cultivating children's mathematical thinking ability, fully stimulating the potential of the left and right brains and developing the whole brain. After rapid mental arithmetic training, preschool children can deeply understand the essence of mathematics (including), the meaning of numbers (cardinal number, ordinal number, including), the operation mechanism of numbers (addition and subtraction of numbers with the same number) and the way of mathematical logic operation, so that children can master the method of dealing with complex information decomposition and develop divergent thinking and reverse thinking. The child's brain works fast.
2 Quick calculation 2: Swallow gold in the sleeve, quick calculation.
Quick calculation 2: In the CCTV hit drama "Going West", tofu flower praised Ching Tien Association for its quick calculation of "swallowing gold in the sleeve" many times. (that is, you don't need an abacus for calculation)! So what is the speed algorithm of swallowing gold in the sleeve?
Swallowing gold in the sleeve is a quick calculation method and a numerical calculation method invented by ancient businessmen in China. The sleeves of ancient clothes were hypertrophy, and only two hands were in the sleeves when calculating, which was called swallowing gold in the sleeves. There used to be a ballad about this calculation method; "Swallowing gold on the sleeve is as wonderful as a fairy, and the number of fingers is moving. You learn priceless treasures, but your bosom friends don't pass them on."
The algorithm of swallowing gold in the sleeve is a folk palm calculation method. Businessmen in China do math, while Shanxi businessmen do accounts while walking. Ten fingers are an abacus, so Shanxi people always swallow a pair of hands in their sleeves for fear of revealing his economic secrets. In the past, in order to make a living, people would not easily spread the secret of this algorithm, and a fast calculation method called "swallowing gold in the sleeve", which has been circulating in China for at least 400 years, is also on the verge of extinction.
According to relevant data, in A.D. 1573, a scholar named Xu Xinlu wrote a book "The Pearl Plate Algorithm", which first described the rapid calculation of swallowing gold into the sleeve; In A.D. 1592, a mathematician named Cheng Dawei published a book, Algorithm Planning, which described the swallowing of gold in the sleeve in detail for the first time. Later, merchants, especially Shanxi merchants, popularized this ancient quick calculation method. The algorithm of "swallowing gold in the sleeve" is a stunt of Shanxi's bank secrecy, and some big merchants and shopkeepers in xi 'an know this fast algorithm.
The method of quickly calculating numbers by swallowing gold into the sleeve is to use five fingers of the left hand as the digital dial, each finger represents a number, and five fingers can represent five numbers: one, ten, hundred, thousand and ten thousand. The upper, middle and lower segments of each finger respectively represent the number 1-9. Arrange three numbers on each section, and the arrangement rules are divided into three columns: left, middle and right. Fingers are arranged upside down on the left (from bottom to top), 1, 2, 3; Fingers are arranged upside down (from top to bottom) in the middle, 4, 5, 6; Fingers are arranged upside down, 7, 8, 9. The calculation method of swallowing gold in the sleeve is a method of using mental arithmetic to reproduce the calculation process with the image of the brain and get the result. It regards the left hand as a virtual abacus with five gears, and clicks the virtual abacus with the right hand to calculate. When counting, point the fingers of your left hand with the fingers of your right hand. Its clear division of labor is: right thumb/left thumb, right index finger, left middle finger, right ring finger, left ring finger and right little finger. The corresponding professional division of labor does not interfere with each other. Which finger is clicked, which finger is extended, and which finger is not clicked, bending, indicating 0. It doesn't need any calculation tools, and it doesn't list arithmetic programs. It only needs to close two hands gently to know the answer number, and can perform four operations of addition, subtraction, multiplication and division on any number within100000 digits.
Swallowing gold in the sleeve, its operation speed (after a certain period of practice, of course) can be comparable to that of an electronic computer, multiplication and division are faster than abacus calculation, and square calculation is much faster than pen calculation. Although for beginners, using' swallowing gold in the sleeve' to calculate simple data is not as fast as a calculator, after mastering this skill, the calculation speed is even faster than a calculator. Someone once calculated the speed of the' swallowing gold in the sleeve' algorithm. A person skilled in this skill will get a 3-to 4-digit multiplication result, which takes about 2 seconds. The result is 5 to 7 digits, about 7 seconds;
Although the algorithm of swallowing gold into the sleeve is born out of abacus, compared with abacus, it does not need any tools, only uses one pair of hands. Because it has the characteristics of "swallowing gold in the sleeve" without tools and eyes, it is very suitable for field work and can also be used in the dark, especially for the blind, and some problems can be solved through this algorithm. "As the saying goes,' ten fingers are connected to one heart', training calculation skills with fingers can exercise bones and muscles, and clever thinking can promote the mind and improve brain power."
Nowadays, businessmen don't have to swallow gold into their sleeves to settle accounts. However, some educators have applied this method to the field of early childhood education. Teacher Niu Hongwei of Xi 'an has been engaged in education for many years, which has improved the swallowing of gold in his sleeve. Make learning easier, more convenient and faster. He has taught thousands of children to learn the improved "swallowing gold in the sleeve". It has a good effect in inspiring children's intelligence. Swallowing gold in the sleeve-developing the child's whole brain. Swallowing gold in the sleeve is not a special function, but a scientific teaching method. More magical than abacus mental arithmetic. It uses hands and brains to complete the fast calculation of addition, subtraction, multiplication and division with amazing speed and high precision. It effectively develops students' brains and stimulates their potential. Innovative fast calculation of swallowing gold in sleeve —— whole brain palmprint calculation —— Niu Hongwei obtained the patent certificate issued by People's Republic of China (PRC) and China National Intellectual Property Administration on May 6th, 2009. Patent number; ZL200830 1 164377。 . Protected by the Patent Law of People's Republic of China (PRC).
The speed algorithm of swallowing gold in the sleeve reduces the complicated calculation process of the pen calculation formula, saves time and effort, and improves the calculation speed of students. You can calculate the addition, subtraction, multiplication and division of any number within100000 digits by hand and brain, and use it to quickly complete the calculation of addition, subtraction, multiplication and division with high accuracy. After two or three months' study, with calculations like 64983+68496 and 78×63, junior children can blurt out the answers with their hands folded.
Innovate the algorithm of swallowing gold in the sleeve-the whole brain palm is a way for children to remember it in their hands and work it out in their minds. Without any calculation tools, they will know the answer with their hands folded. This method is to count the knuckles of the left hand by simulating the bead counting gear on the abacus, and use the left hand as a "five-gear abacus" and use the right hand to draw beads, thus making the human hand a perfect calculator. Students can calculate the result of 100 thousand digits in the calculation process, which is easy to understand and learn. It can really exercise children's brain, heart and hands, and improve their computing ability, memory and self-confidence.