Secondly, as a mental arithmetic, someone must have summarized a lot of tricks of arithmetic, as long as you are willing to learn and make use of those tricks, the arithmetic ability can certainly be improved. This is like the Rubik's Cube, ordinary people have never played, want to play out certainly is very difficult, but long-term players will make use of the experience of those who have summarized the know-how of the previous generation, a very short period of time can be spelled out.
Third, talent is very important, each person's talent is different, in arithmetic on the talent, plus the latter day exercise on the cattle.
Fourth, you see his heart is very powerful, but you will find that this skill to a certain extent is a natural skill. At the beginning of this calculation is the exercise of the brain, can improve the performance of the brain, so that we can quickly and efficiently solve the face of other tasks, to the point of those who kind of professionalism is no longer the exercise of the brain, but the overload of the brain, is in the brain. It's like the Go king who knows nothing but Go, or the sprinter who knows nothing but running. Pushing one's life in an extreme direction leads to a certain level of success, yet such success is in fact of little value. Do I need a human brain to calculate big data? Any computer can turn people into dregs in minutes, the purpose of our invention of computing is for other things, not for the purpose of calculating itself, just like running is to exercise the body, definitely not for the purpose of walking all over the world, to purely pursue the speed, distance, airplanes, trains, which is not better than running. Life is short, always put your energy into a meaningful place to go.