The so-called abacus mental arithmetic is abacus mental arithmetic. Abacus calculation is a calculation method that uses abacus as a tool to perform operations such as addition, subtraction, multiplication, division and square root. There are certain rules and formulas in its bead-carrying skills. When the user can skillfully operate the abacus,

Not only can you get the correct answer quickly, but you can also describe the floating changes of the abacus's disk, grade and beads in your mind through the growth of brain cells. 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.

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In the process of abacus mental arithmetic teaching, abacus is the foundation. By using abacus, students can understand the changes and methods of the four calculation methods. With the mastery of skills, the image in learners' minds is gradually formed. Through the simulation operation of mirror image (virtual disk), the mental arithmetic function is generated, which is an advanced expression of abacus calculation. Abacus and mental arithmetic are like two feet. One cannot choose to walk alone.

Abacus learning, you can master the calculation ability and memory ability skillfully. The representation of memory ability is the most important image in mental arithmetic. In the process of calculation, the bead image instantly changes from a static bead to many moving beads, which is completed in a short time. Therefore, the more skilled the abacus skills, the better the mental arithmetic.

Therefore, in the process of learning abacus calculation, abacus calculation and mental calculation should be parallel, and abacus calculation should first lay a good foundation and express it immediately after mental calculation. As the abacus becomes more and more difficult to calculate, it will gradually improve, and mental arithmetic will be more unimpeded and unrestrained. Careful calculation of space goes beyond the limit of abacus, that is, it reaches the highest level of learners.