Stone Age Husband Raising Journal

Kumano is really good at math, he can count exactly how many people there are in the tribe, and he can't make a mistake when dividing things.

But from OnePlus to 99...

He had never calculated anything like this before.

But this can indeed be practiced, maybe when it will be used?

Thinking of this, Kumano began to count: "1, 2, 3..."

Grandpa Priest taught him to count to one hundred, but it is easy to make mistakes in counting like this. He counted by ten and put them in a pile. If there are ten small piles, it becomes a hundred. Put them together to form a big pile, and then count next hundred...

Finally counting the results, Kumano immediately looked at Zhou Ji, wanting to tell his results, but found that Zhou Ji had fallen asleep.

He felt itchy again, but Zhou Ji was not feeling well...

Kumano simply lay down on the bed and became self-sufficient. He used to do this all the time, and after he became a partner with Zhou Ji, he changed to Zhou Ji to help him.

Zhou Ji, who was actually not asleep: "..."

In the middle of his work, Kumano saw Zhou Ji opened his eyes, leaned over to kiss him again, and said, "Zhou Ji, touch it for me!"

Zhou Ji glanced at him and stretched out his hand, Kumano took advantage of the situation and hugged him, humming softly.

When it was finally over, Kumano couldn't get up comfortably, but Zhou Ji pinched his face: "Did you figure out the problem I asked you to calculate?"

"It's figured out!" Kumano said.

"how many?"

Kumano got up from the bed, looked at his pile of sticks, and finally said, "It's 49 plus 49!"

"Wrong, it should be 49, which is one hundred plus fifty." Zhou Ji said, people in the tribe are generally not exposed to too many numbers, so they only count to one hundred, and then several hundred That's it.

Modern people probably find it troublesome, but it’s actually pretty good for people to be able to count to one hundred smoothly. Zhou Ji remembers that to say 99 in French, you need to say four twenty plus ten plus nine...

"Why?" Kumano looked at Zhou Ji puzzledly: "Have you counted? I haven't seen you counted before!"

Such a powerful subject, if Zhou Ji did the math, he should see a lot of wooden sticks.

"You don't need to count, I know the answer when I think about it in my heart." Zhou Ji said.

Can you know the answer if you think about it in your heart?Kumano looked at Zhou Ji in shock: "Did the Beast God tell you?"

Zhou Ji: "...you think too much."

"Then how did you know?"

"Didn't you separate the piles before? The first pile is one, and the last pile is 99. If the two piles are added together, is it a hundred?" Zhou Ji slowly said the algorithm. His parents value education Yes, he was sent to the Mathematics Olympiad class when he was very young. This kind of topic was used for the enlightenment of Mathematics Olympiad at that time.

Kumano suddenly realized, and re-arranged it again, and found that it was indeed 49 one hundred plus one fifty.

As for why he made a wrong calculation before, it was probably because he accidentally lost a piece.

After making the topic, Kumano said sincerely again: "Zhou Ji, you are so smart!"

"Do you want me to teach you?" Zhou Ji asked.

Without even thinking about it, Kumano said, "I want to! But haven't I already learned it?" He has learned this topic, so he can ask the priest to do it!

"You only learned one algorithm, let me start the topic again... I caught eight dinosaurs, some of these eight dinosaurs were two-legged, some were four-legged, and there were 22 legs in total. Only two-legged dinosaurs, how many four-legged dinosaurs?" Zhou Ji said, the classic Olympiad problem chicken and rabbit came in the same cage.

Kumano didn't know about Mathematical Olympiad questions, so he took out 22 wooden sticks and started to swing...

It's not difficult to put this question so directly. After each of the eight dinosaurs was given two legs, add a few four legs to the rest, and it will be calculated.

Kumano was a little proud, but in the end...

Zhou Ji said: "What if I caught a total of one hundred dinosaurs, a total of three hundred plus twenty legs?"

Kumano was fiddling with calculations before, and thought it was quite interesting, but he was dumbfounded by Zhou Ji's words - this is how to calculate?And... "You can't catch that many dinosaurs! Now, all the people in our tribe can't catch them."

Zhou Ji smiled: "I'll give you fish soup. After you drink half a bowl, I'll fill it up for you. After you drink half a bowl, I'll fill it up again. After you drink half a bowl, I'll fill it up again. This time You drank all the fish soup, how many bowls of fish soup did you drink in total?"

Kumano didn't understand for a while: "Why do you count this?"

"A dinosaur can eat half of the grass in a year, how many years will it take to eat all the grass?"

"I know that!" Kumano said, "Two years!"

"Wrong!" Zhou Ji said: "The grass grows, it is impossible to finish it in two years."

Indeed it is!Kumano looked at Zhou Ji with admiration, Zhou Ji was really powerful and smart.

Seeing this, Zhou Ji, who tormented primitive people with elementary school Mathematical Olympiads and brain teasers, said, "Come on, let me teach you arithmetic. To become a qualified patriarch, you should learn more."

"Okay! Do you want the priest to learn it together?" Kumano didn't dare to say that he had already learned it this time, but he thought of the priest—the priest has always liked to learn these things.

"I'm uncomfortable, and I can't teach too many people." Zhou Ji said.

"Then teach me one!" Kumano said without thinking, and decided to learn it by himself before teaching it to the priest.

"Then I'll teach you how to write numbers first," Zhou Ji said.

"Write?" Kumano was puzzled.

"Yes, write." Zhou Ji took out a piece of charcoal that he used as a pen, and gave it to Kumano: "Take this to write."

Kumano took the piece of charcoal, and began to write numbers under Zhou Ji's guidance.

Zhou Ji actually thought of a way to write each number, which is really amazing, he is even better than the previous priests.

Kumano looked at Zhou Ji with admiration, while holding charcoal in his big hand and writing slowly in the cave.

Zhou Ji said: "Your '8' doesn't look good...I hold your handwriting."

"Okay!" Kumano agreed, and then Zhou Ji held his hand.

His hands are rough, but Zhou Ji's hands... are really tender and slippery!

Kumano was a little distracted, and then he heard Zhou Ji say: "You don't concentrate on writing, I will give you some punishment."

"What punishment?" Kumano asked.

Zhou Ji drew a circle on Kumano's face with charcoal.

Kumano doesn't know why—is this considered punishment?painless...

Then several circles were drawn on his face, and later even on his body...

Kumano didn't think there was anything wrong, what Zhou Ji taught him was mostly knowledge that only the beast gods knew.In the past, what he learned from the priests was not as good as these. If he didn't learn well, he would be beaten.

Kumano "hum-chi-hum-chi" studied all afternoon, learned the Arabic numerals from one to nine, and counted one to one hundred fluently.

At this time, Xiong He's voice sounded: "It's time to eat!"

Kumano immediately ran out: "Zhou Ji, I'm going to eat first! I'll learn later!"

Zhou Ji: "..." This guy forgot to wash his face!

Zhou Ji was too lazy to go down and lay down directly.

Kumano got excited when he heard the sound of eating, and indeed he forgot what was on his face, and he didn't remember it until he went outside.

But he didn't take it seriously, he just forgot if he forgot, painting something on his face was fine, and it didn't affect his actions!

However, the people in the tribe were surprised when they saw him like this: "Kumano, what is that on your face?"

"It's a circle, Zhou Ji drew it for me." Kumano said.

"The drawing is so beautiful! Kumano, you look so beautiful!" Xiong Qi praised: "Look at this circle, how round it is, and the two sides are still the same circle!"

When Zhou Ji used charcoal to draw circles on Kumano, he didn't draw them in doodles, he paid attention to symmetry. Now Kumano has a circle on his face, which looks very mysterious!

The priests all came over: "Kumano, why did Zhou Ji draw a circle for you?" Is this a strange ceremony or a sacrifice?

"Zhou Ji drew it for me when he was teaching me how to count." Kumano originally wanted to say that he didn't learn Zhou Ji well to draw for him, but he didn't want people to know that he was stupid, so he didn't say it.

"Count?" The priest was curious.

"It's just counting." Kumano looked at the priest: "Grandpa Priest, do you know what is one plus two plus three until 99 is equal?"

"It's a bit difficult, I have to calculate slowly, and I'm afraid there won't be enough sticks." The priest started looking for sticks.

Kumano said: "It's actually very simple, this way..." He repeated what Zhou Ji said.

The priest was shocked all of a sudden, how could it be like this?so amazing!

Especially... Kumano actually wrote numbers on the ground!

It turns out that numbers can still be represented by such symbols?It is indeed a lot more convenient!He has always used wooden sticks. If he wants to write, he will draw a few wooden sticks... His hand is very sour.

The priest's expression became agitated, looking at the circle on Kumano's face, it was as if he saw a pile of treasure.

The priest looked at the circle on Kumano's face in reverence.

Zhou Ji didn't want to get mixed up with the tribe below, so he made some barley to cook porridge, and at the same time began to miss the elephant bird meat.

If he eats too much fish every day, he feels that the fish is not tasty, and he wants to eat some other meat.

There was nothing to do today, Zhou Ji didn't use his mental strength to observe the situation in the col. He didn't turn his head until someone climbed to the door of his cave, and then saw the old face of the priest.

The priest grinned at him, revealing his gums with only a few teeth left: "Zhou Ji, draw a few circles for me too, I also want to learn the knowledge of the Beast God Sect!"

Zhou Ji: "..." What did Kumano say below!