As a result, 1032.

Finally, the simplest "addition and subtraction" is to add the product of the two possessions: 5150 + 1032 = 6192.

Xiang Zhong dipped his fingers in water, used the method of Arabic numerals, and secretly calculated the answer on the side, but he just wanted to check whether the calculation with "planning" was accurate.

The result made him extremely impressed: there was no mistake at all, and he thought: "This ancient man is really a cow!" ”

Man has two hands and ten fingers, so counting is also inherently "decimal", and the vast majority of early humans in the world are like this. Of course, there are exceptions, some places are hot, there are many opportunities for barefoot, and the ancestors of those people, even counting the toes, created the "decimal system", but it is definitely a minority.

How did Mr. Zan Yi know that Xiang Zhong would also use water as a tool, secretly calculate, and there was a more advanced set of algorithms, but he was surprised that this kid learned too fast, and he didn't know what to teach him later!

Guangkang taught the guqin, which required scholars to have a certain degree of finger power, but Xiang Chong was too young, and his little hands were immature and unbearable, so he was taught to learn to play the xun, starting from the simplest four-hole fish-shaped xun.

This kind of Guxun, pure soil refining, thin tire hollow, carcass thickness is only about 3 mm, I really don't know the hollow inside, but also smooth, to meet the requirements of timbre, how to dig out.

The whole Xun is only the size of a duck egg, like a puffer fish that is bulging, the fish mouth is the lip blowing place of the player, the fish identity is positive and negative, the front is depicted with fish scales, the reverse side is engraved with the name of the seal body "Huang Drum", in the lower right corner of the word "drum", there is a hole; The two positions of the fisheye on the front are two holes of the same size.

When playing, put the fish upright, and the fish's mouth "mouth to mouth", the two hands arch together, in a wrapping posture, the two index fingers in the gesture can be used to seal the hole of the fish's eye; The thumb of the right hand can just be used to plug the hole in the lower right corner of the word "drum" on the reverse side.

In this way, there is only one mouth and all three fingers: the two index fingers of the left and right hands and the thumb of the right hand, and you can play a decent tune!

Xiang Zhong likes this "fat pufferfish" very much, especially when aiming at the mouth of the fish, the kind of similar human voice that blows out, the sound texture of thick, whimpering, mournful, and crying, as soon as it blows, there is a kind of instant change of scenery, as if you close your eyes and blow, you are in the Hu Feng side plug, the vast desert, the kind of innate sense of desolation, loneliness, will come out of nowhere, without too complicated skills, as long as a blow, it is enough to make the wanderer cry, the chivalrous knife.

It is such a magical instrument, Mr. Guangkang specially asked Xiang Zheng to match the guqin music, and carried out a demonstration blowing, the tune is very simple, a Xun and a qin, two phases of blowing, sometimes dialogue, sometimes harmony, just like two sages are discussing advanced knowledge, people can not help but think of a lot of scenes: Xun can show the long roar of the war horse, and the qin is the thousands of mountains and rivers trampled by the horse, endless ravines...... The sound of the music is very loud, but it does not prevent him from appreciating it.

Although there are only four holes, there are many blowing techniques: for example, the mouth blows can be fed into a concentrated, even air flow to blow a steady long note; It can also be intermittently stuck, and it will blow out the crying effect of "crying, whimpering"; When the two are combined, it is like the sound effect of Meng Jiangnu about to cry down the Great Wall.

Speaking of fingers, if you just plug or let go of the three holes alone, there will only be a few notes, which is far from enough compared to the normal scale, so how can you produce richer sounds?

Xiang Zhong found that when Mr. Guangkang was playing, his fingers sometimes covered the holes all the holes, and sometimes half covered, so that a hole could emit different pitches due to the change in the area of the plug; In addition, the fingers sometimes vibrate up and down to put the lid down, and it has an effect similar to that of an owl.

It's so much fun!

So, Xiang reuse began to experiment, and the sound of music in his head was much clearer than that played by others. After repeated rehearsals, he finally figured out the "123456" six scales, which is already the widest scale for this four-hole beginner student.

Xiang Zhong also found that all the pieces taught by Mr. Guangkang were missing the 4 note, and he had been able to successfully play the 4 notes with reference to the 2 blowing method.

In fact, if he wanted to, all the other ascending semitones between 1 and 6 could be fine-tuned by the area of the hole in the cover, but the tunes he knew didn't need to use those semitones to adjust the precision to such a level.

Xiang Zhong summed up the rules of fingering for himself: "Don't worry about the hole blown by the mouth, just look at the fingering: if you want to eat with your left finger, eat with your right finger, and the three holes controlled by your right thumb are A, B, and C, then:

When blowing 1, A, B, and C are all blocked;

When blowing 2, the remaining finger is completely blocked as it is, and B is half of it;

When blowing 3, A and C still do not move, and B is all let go and does not block the vacancy;

When blowing 4, A and B each put half of it, and C is as it is, and it is completely blocked;

When blowing 5, A and B all let go, leaving C unchanged and still full;

Wait until 6 is blown, and all the three fingers of A, B and C are empty and not blocked. ”

In this way, practice repeatedly, until you no longer think about whether to plug the hole, or empty it, or block half, this process is completely accustomed to being directly omitted naturally, and muscle memory has been formed, and the fingering and pitch are matched one by one, becoming a fixed action.

Although there is only a 6th scale, as long as the high 8th degree is mixed with the low 8th degree, it can already satisfy many songs, such as the famous best soundtrack "Su Wu Shepherd", "A Laugh in the Sea", and even the Japanese composer Sojiro's ocarina song "The Original Scenery of the Hometown...... Of course, it is impossible for Mr. Guangkang to hear these, and Xiang Zhong feels that it is too suitable to use Xun to practice these familiar tunes.

Guangkangjiao's tunes, he learned them in three or two strokes, and when he saw that there were no new songs, he first played other songs that were familiar to him in his memory, and had a lot of fun.

On the side, Guangkang listened to it with mixed feelings, shook his head and sighed: "What should I do?" will compose new songs by himself, this kid can't teach anymore! ”

It was Mr. Zhanhui's turn to teach Xiang Zhong "calligraphy": writing and literacy, for Xiang Chong, they were all one-time "clearances", not only that, but he also "creatively" wrote a bunch of "novel" fonts for Mr. Zhan: small seal, official script, regular script, line script, cursive, and even English, Japanese, Arabic......

After this pile of strange fonts was wildly written on many precious volumes of cloth that Xiang Zhong wasted, when he proudly showed it to Mr. Zhanhui, Mr. Zhan only felt that his eyes were full of "heavenly books"! I don't know what strange things are hidden in this child's mind!