It's not a three-year-old child, what kind of arithmetic problem do you have to wrench your fingers to calculate?

At first, Yi Tian didn't take it seriously, but he was soon surprised to find that this was not so simple. Pen, fun, pavilion www. biquge。 info

The operators in the underground are arranged into four lines: merchant, real, dharma, and borrowing, of which seven hundred and eighty-two have been counted in the merchant position.

"This is the opening of the nine chapters of arithmetic. ”

Gu Chengcai stepped forward from behind and said softly: "City Lord, he is counting with ten fingers with both hands, calculating thirty-four thousand three hundred and seventy-two prescription techniques. ”

As soon as the words fell, before Yi Tian could speak, the old man in sackcloth said, 'Huh', turned his head and glared at the two of them, but then quickly lowered his head and calculated.

Probably disturbed by his thoughts, his fingers seemed to be a little stagnant, frowning and pondering, but it was half to no avail.

"Thirty-nine!"

At this time, Gu Chengcai seemed to blurt out without thinking, and immediately blurted out beside him.

The old man in sackcloth had a somewhat unsightly face, but his fingers seemed to be uncontrollable, and he began to swing rapidly, and it seemed that he would soon get the result, and he counted on the operator, but it was indeed thirty-nine.

This time, the old man in Mai was surprised, but when he turned his head to look carefully, he saw Gu Chengcai's young and immature face, which seemed to be even more incredible.

"This ...... No way!"

For some reason, the old man in sackcloth suddenly rushed forward, reached out and grabbed Gu Chengcai's empty left sleeve, and immediately became angry.

"Yellow-mouthed child, the blind cat meets the dead mouse, and you just happen to be blinded. ”

Gu Chengcai's face was full of calm, and he said indifferently: "It's just ten fingers on both hands, but what's so difficult?"

"Nonsense, you only have one hand. ”

The old man in sackcloth looked furious, reached out and grabbed the empty sleeve, and said sharply: "Tell me, how to calculate with only five fingers?"

"You're wrong, I have ten hands. ”

When he said this, Gu Chengcai pointed his right hand to his head and said indifferently: "However, it's all in my head." ”

"Young man, what kind of nonsense?"

The old man in sackcloth didn't believe it at all, and said with a sneer: "Okay, then the old man will take a test to see if you have real talent?"

"Please!"

Gu Chengcai didn't seem to take it seriously at all, if he wanted to become a powerful array mage, he had to dabble in astronomy, I Ching, arithmetic, Gewuxue, yin and yang five elements, etc., of which arithmetic was only one of them.

The ten-finger calculation of both hands just now is actually the conversion of binary and decimal, although he only has one hand, but he can virtually create several hands in his brain, and the speed is naturally extremely fast.

The old man in Mai walked with his hands in his hands, and said in a deep voice: "I don't know how many things are there today, two of three or three are left, three of five or five are left, and two of seven or seven are left, ask how much is the object?"

"Twenty-three!"

Gu Chengcai seemed to come with his mouth open, he didn't think about it at all, and his talent was really shocking.

"Wait, wait!"

On the contrary, Yi Tian next to him suddenly figured out the truth, using twenty-three to remove three remaining two, dividing five remaining three, and dividing seven remaining two, isn't this the law of residual?

"It's a simple question, and it's not surprising that you can answer it quickly. ”

The old man in Mai snorted coldly, suddenly walked to the corner of the wall, pointed to a large basket of oranges on the ground, and laughed: "This is the orange picked by the old man in the early morning, which is divided into three types: warm orange, green orange, and plaque orange. ”

Speaking of this, he seemed to be thinking, and said after a moment of silence: "Now Wen Ju is seven cents for one, green oranges are four cents for one, plaques are three for one cent, and one hundred oranges are picked for one hundred cents, but how do you choose?"

"What's so hard about that?"

Gu Chengcai just thought about it for a moment, then stepped forward and squatted on the ground, stretched out his hand to pick it up in the orange basket, and laid it out on the ground in turn, but it was no more, no less, just a hundred.

"Let's see, is this a hundred cents?"

As he spoke, Gu Chengcai stood up, as if he had done something insignificant.

At this time, Yi Tian also stepped forward and counted carefully, but found that there were six warm oranges, ten green oranges, and eighty-four plaques.

In fact, he can also solve this problem, but if it involves equations, it naturally takes some effort, but where is Gu Chengcai's speed?

"Well, it's kind of smart. ”

Although the old man in Mai said it easily, the expression on his face was still a little surprised, and he soon came up with a new topic.

"Today, there are thousands of miles of horses traveling thousands of miles a day, there are fast horses traveling 600 miles a day, and fast horses go first 100 miles, let thousands of miles chase after them, how many miles can I catch up?"

Gu Chengcai frowned slightly, but soon it unfolded, and just as he was about to speak, he suddenly heard a voice next to him.

"Chengcai, let me this question!"

It was no one else who spoke, of course, it was Yi Tian, who had already been itchy, although he was a little slow to calculate, but it didn't mean that he wouldn't count, after all, the nine-year compulsory education was not in vain.

Seeing the city lord speak, Gu Chengcai of course didn't dare to answer, and hurriedly retreated respectfully to the side.

"You ......"

The old man in sackcloth seemed to be a little surprised, he turned his head to look at Yi Tian, but his face was full of disbelief.

Are you kidding?

When was arithmetic so worthless, could anyone be counted?

Yi Tian ignored him anymore, just reached out and picked up a bamboo stick, and began to calculate on the ground.

The old man in sackcloth raised his head, but he didn't bother to look at it at all, only as if he was pretending to be a ghost.

Gu Chengcai stepped forward and looked down, but saw that the ground was quickly filled with numbers, which were also simple and easy to recognize, but there were two strange symbols inside, so he was a little incomprehensible.

"Huh!"

Soon, Gu Chengcai's expression became surprised, although he already knew the answer, but the algorithm was several times more cumbersome, but his mental arithmetic ability was amazing, hundreds of times faster than ordinary people, so he covered up the shortcomings.

Of course, his algorithm is only suitable for himself, if he teaches it to others, I am afraid that no matter how smart people are, it will be difficult for them to understand.

However, don't look at the slow writing of the city lord on the ground, but the algorithm is simple and direct, anyone standing here is afraid that they will soon be able to understand it, this is completely universal knowledge.

"Two hundred and fifty miles!"

Yi Tian laughed, threw the bamboo stick on the ground, and said loudly: "If a thousand miles gallop for two hundred and fifty miles, you can catch up with the fast horse in front." ”

"What?"

The old man in sackcloth was taken aback, and immediately stepped forward, looking down on the ground, at first with a look of disdain on his face, but soon he was attracted to it, and the look on his face became surprised.

The ground was dimly lit, he immediately grabbed the oil lamp on the table, knelt on the ground and looked carefully, only to feel that those numbers were arranged up and down, left and right, interconnected and changing, intricate, which made people can't help but open their eyes, as if a window was pushed open in their minds, and they suddenly became clear.

"City Lord, this is a dualistic calculation, is it a backward calculation of the heavenly element and the earth element?"

Gu Chengcai is really a genius, and he quickly saw the key, but he still didn't understand the formula reasoning

This made Yi Tian a little surprised, of course he understood what Gu Chengcai meant, the so-called Tian Yuan represents X, and Di Yuan represents Y, it seems that this formation genius is really powerful.

However, everyone understands that the earth is attractive, but only Newton deduced the laws, and it is not so easy to calculate the formula immediately.