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 calculator can blurt out the answers or write them out immediately. Therefore, abacus mental center is an advanced computing technology.
Extended data
Abacus mental arithmetic is inseparable from mathematics. Abacus mental arithmetic is a unique computing system based on mathematical principles, using abacus as a tool and using abacus to represent numbers. Mathematics is an abstract thinking activity, and it is difficult to learn mathematics because of poor abstract thinking ability in childhood. Integrating abacus mental arithmetic into primary school mathematics is conducive to solving the problem of difficult mathematics learning in the enlightenment stage.
In the current primary school mathematics textbooks, the tedious calculation process wastes a lot of time for primary school students. Practice shows that abacus mental arithmetic saves about 50% of thinking and division saves about 70% of thinking. Multiplication and division operations pay special attention to the simplification of "genes". Numbers and beads are symbols.
Baidu encyclopedia-abacus mental arithmetic