I believe many parents and friends have heard of abacus mental arithmetic, but what is abacus mental arithmetic? The state has banned abacus mental arithmetic from appearing in primary school textbooks. Why? Today, I will unveil the mystery of abacus mental arithmetic and take you to find out!
(1) What is abacus mental arithmetic?
The so-called abacus mental arithmetic, that is, abacus mental arithmetic, is a calculation method that uses abacus as a tool to add, subtract, multiply and divide squares. There are certain rules and formulas in the skill of transporting beads. When the user can skillfully operate the abacus, he can not only get the correct answer quickly, but also describe the disk type, grade and floating change of the abacus in his mind. This vivid abacus image is called "virtual disk". It completes abacus calculation in the brain through the process of perception, image and memory, which is what we call abacus mental calculation.
The speed of mental arithmetic is amazing. Often, as long as you hear the number of questions or see the calculation questions yourself, the operator can blurt out the answers or write them out immediately, so abacus mental arithmetic is an advanced computing technology.
(B) the advantages and disadvantages of learning abacus mental arithmetic
1, which accords with the development and movement law of children's auditory vision.
Children's understanding of things is interesting, curious and intuitive. When learning abacus mental arithmetic, this concrete, intuitive and vivid counting tool is not only a teaching aid, but also a learning tool and toy for beginners.
2. Improve attention and memory.
In abacus mental arithmetic teaching, the vivid memory of bead schema is constantly strengthened, which greatly stimulates the right brain and fully develops the sleeping human right brain, which can improve the baby's attention and memory.
3. This algorithm is inconsistent with the current algorithm.
The calculation method of abacus mental arithmetic and the calculation method of primary school mathematics are two different calculation methods. The calculation method of abacus mental arithmetic is from high position to low position, that is, from left to right, while the vertical calculation is from low position to high position, that is, from right to left, which has some conflicts.
4, learning mental arithmetic is very boring, which may destroy children's interest in learning.
Learning abacus is boring, and it is difficult for children to sit still. It may be hard to learn abacus mental arithmetic, but if the baby is happy, hard work is also fun for him. The most important thing is to protect the baby's interest. If you lose your baby's interest in mathematics, even in school and study, it will not be worth the loss.
(3) Why does the state prohibit mental arithmetic?
First of all, the state does not prohibit abacus mental arithmetic, but prohibits it from being transformed into a compulsory course in primary schools and kindergartens. Then, why does the country not allow abacus mental arithmetic to appear in primary school classrooms? The main reasons can be divided into the following three aspects.
The calculation order of abacus mental arithmetic is opposite to that taught in primary schools.
The calculation method of abacus mental arithmetic is from high position to low position, that is, from left to right; The vertical calculation is from low position to high position, that is, from right to left. There is a certain conflict between the two, which is easy to be confused. Without good guidance, it will even slow down the operation speed.
Abacus mental arithmetic is not conducive to the cultivation of children's abstract thinking.
Abacus mental arithmetic is a fast calculation method of concrete memory, which uses the thinking mode of images in abstract calculation to make children's brains mistakenly think that this way is a way to manipulate numbers. But in fact, the development of human thinking from concrete to abstract is irreversible. If children are taught by concrete memory when they should be enlightened by abstract thinking, they will miss the opportunity of enlightenment by abstract thinking.
A lot of time to learn fast arithmetic is not conducive to the cultivation of mathematical ability.
This mental arithmetic ability is often over-deified, which leads to students and parents' obsession with it. But abacus mental arithmetic is not worth wasting so much time to learn, because the meaning and value of numbers are not only used in operation, but more importantly, the cultivation of imagination and logical thinking. Children who have studied abacus mental arithmetic always think of abacus mental arithmetic before calculating problems in primary school mathematics calculation, which is easy to confuse abacus mental arithmetic with the expression of "number" in primary school mathematics, and it is difficult to establish an understanding of logarithm concept and form basic mathematical logic ability, thus causing obstacles to mathematics learning.
Generally speaking, you can learn abacus mental arithmetic to improve the speed of oral calculation. However, it should be noted that mental arithmetic should not take up too much study time. After all, mathematics is not just arithmetic, and excessive practice may even make children feel tired of learning, thus resisting mathematics, which is not worth the candle.