Only in March in the Julian calendar, the Gulf of Bothnia will begin to thaw. When it is thawed and it is safe to sail, it is already April.

Hanukkah ends with the first ray of sunshine in 829 AD.

The return of sunlight has announced many things. As the daytime becomes longer and longer, the people will have more daytime for work.

There is another tradition of the tribe. One hundred days after Hanukkah, most of the sea ice will melt, and people will have another festival.

This picture of the Ross tribe, which has been around for nearly half a year, and their long boats can sail freely on the thawing sea. The long period of time consumes a large amount of people's food reserves. Even if many people hunt in winter, every household's food reserves will become stretched when the thawing is approaching.

Now, members of the tribe are facing new problems.

Only part of the entire tribe is rich. The rich are often the strongest men and the most experienced fishermen. These people are eager to own a steel sword of their own, and also hope to continue to buy the soap plot itself.

In addition, they also need to obtain other consumer products to meet their own needs.

The long ships hidden in the docks stepped up repairs, and some new ships were also accelerated in the wooden houses. The fishermen who yearn for greater wealth hope that the sea ice will melt as soon as possible.

Those foreigners living in Roseburg are also looking forward to it.

They have already acted in the snow-covered fjord before the sea ice thaws for the new year's trade.

Various cobblers living in the tribe, they were very busy in the winter of 828. The arrival of a huge amount of fresh animal skins has put all the cobbler families into a lot of busy.

Some cobblers lack capital. They can only get some remuneration for leather processing, but the finished leather must be returned to the leather owner.

Some other cobblers naturally own capital or are large families. For a time, the whole family joined the leather processing.

The family owners invested in buying fresh leather from the beginning. After some processing and further processing, such as making clothes, the wealth obtained is even more pleasant.

However, if the results of the leather processing industry are for domestic sales, it is not a huge profit at all.

There is only one trick, and the finished leather is about to be sold to the south. Make clothes out of deerskin, and decorate the collar and cuffs with fox skin. A leather jacket can even sell for a gold coin.

If you take the risk and sell it to an area controlled by the Danes and pretend to be a local, it is possible to sell it for two gold coins.

There is a way of seeking wealth and wealth, and everyone knows this truth.

is once seen through by the powerful among the Danes, this life is probably on the southern coast of the ocean.

Most cobblers don't dare to take risks. They just want to sell their skills safely and do a small business. Life is like this day by day, unless some realistic pressure forces them to live, the cobbler will be pirates and looting.

The craftsmen of the tribe have this attitude towards life.

But for those foreigners who live as a guest, the situation is completely different.

Foreigners will not and cannot really join the Ross tribe. They are allowed to live in Roseburg, but they are ordered to ban the reclaiming of land to grow things.

Of course, the Ross people have the most variety of onions that are hardy and can mature quickly, and they will not deliberately plant other onions.

Guest residents do not feel that they are being discriminated against, because their identities are always very similar-fishermen, or pure merchants.

Otto needs these guest merchants, who are an important medium for communication between his tribe and his southern allies.

With the presence of these guest merchants, Otto felt that he had no guilty to organize a fleet personally to go to the important activity area of the Mind Subtribe Alliance, namely Lake Mlaren, to personally sell goods from the far north.

Over the years, residents have sold their remaining things to guest merchants. When the ice melts, the merchants will transport them to the south for sale. Starting

So the Ross people do not have to risk being attacked, and the goods in their hands can quickly turn into silver coins, why not do it?

Besides, everyone is more willing to look for opportunities in the East.

Many tribesmen, they sold all the small animals they caught in winter, the meat was eaten, the leather was immediately replaced with silver coins, and even a large pile of soap.

The silver coins from the guest merchant finally gathered in Rurik's hands in large quantities.

Now the situation has changed again, and a large amount of silver coins have begun to flow into the blacksmith's shop in Kravassen.

After Hanukkah, the entire tribe realized that Rurik's dagger was made by the Kravassen family, and a large number of orders followed.

Cravason encountered the most prosperous business opportunity since his ancestors began to strike iron. He engraved all the orders on the wooden boards and collected a tenth of the deposit. He never thought that the deposit alone would be as many as 120 silver coins.

To build a new steelsvard, the so-called steel sword, it costs sixty silver coins no matter how to use it. Every sword is very expensive, but it can cut all the iron swords without any damage. The huge tactical advantage makes all the warriors rush.

The impoverished warrior is envious and longs for more money in the new year. The wealthy warrior paid the deposit as soon as possible, eager to get the steel sword as soon as possible to test whether it works.

The time has entered into January. For Ruriek, life is still cold and boring.

There is a saying that the coldest period in the northern hemisphere is winter, and the weird edge of the Arctic Circle in the Roseburg area makes the climate even worse.

Even so, the tribe is still operating with very low efficiency. Although there are still cases of freezing to death, families with a little wealth are still alive and healthy.

The severe cold forced Rurik to stay in a warm place. He decided to make some new tricks, that is, taking advantage of a lot of time, first do some knowledge training for Lumia.

To make her step up her learning of the Runic and Roman alphabets, and to be able to achieve smooth character conversion.

began to teach her the logic of writing and using Arabic numerals. Since she was actually learning for the first time, everything had to start with the addition of single digits.

will also be peaceful in the evening, Lumia, who returned to the long house of the priest after herding, sat obediently in front of Rurik.

"Masta, I'm back. Regarding what you gave me."

"Have you reviewed everything?" Rurik asked with a sullen face.

"I will. I accept the test of masta." Lumia sat down cautiously, her subconsciously frowning clearly showed her tension.

Hey, her cautious appearance is really cute.

Placed in front of the two of them was a piece of dry pine board, which was actually leftovers from shipbuilding. Rurik needs some brighter writing materials than oak, even rough yellow paper. Now, this whitish pine board may be better.

Paper can be made! Rurik knew that theoretically all the materials for making paper should be available. He tried to purify all kinds of plant-derived fibers and pulverize them. The flocs of the fibers settled into a thin layer, which was dehydrated. That is the original paper.

The so-called paper is probably an accidental invention in the processing of China's silk handicraft industry. Up to now, the Oriental Paper Industry has been very developed.

The Western world did not invent it out of thin air. This is not surprising. Eastern Rome still feels that silk is made of a special kind of plant, just like flax can be woven.

Lurik cut some black charcoal pieces with a knife into some carbon pens.

An early sketch artist, the brush in his hand is a piece of charcoal that has been carefully carved. There is nothing wrong with Rurik doing this, that is, he needs to wash his hands after using it.

He has instilled basic arithmetic skills in Lumia's duck-cracking style. After two weeks of duck-cracking teaching, Lumia has not only distinguished the writing of all numbers from 0 to 9, but theoretically she already knows calculations within a hundred.

"I will give you ten questions, and you must calculate the correct answer for me. If you make a wrong one, give me ten squats. Add ten for the wrong one!"

"Good... good."

Lu Mia swallowed deeply, and in the past few days, she suffered physical punishment from the young master for her mistakes. Ten questions a day, one wrong one, arms forward, squatted and stood up ten times, the worst time I did fifty consecutive times!

It was really a bad feeling. I was so tired and out of breath, and my stomach was suddenly hungry. The worst thing is that the young master will not give me any food compensation.

Ten arithmetic questions were written on the pine board, and these questions were calculated instantly in Rurik. Adding and subtracting calculations within a mere hundred, if you can't get the answer with mental arithmetic, it is really stupid.

But it is a severe test for Lumia, as simple as 20+25, she has to consider the correct answer.

I can't say that her IQ is stupid, just because she should have been exposed to it when she was five or six years old, but because of the limitations of the times, she was afraid that she would be illiterate for a lifetime in her original life. A ten-year-old child is equivalent to fourth grade, and she can master multiplication no matter what.

Lumia, she already knows what a plus sign is, what a minus sign is, and what an equal sign is.

The pure digital symbols are too abstract, and she has to make a pen with a thin wooden stick on the dry ground on one side, and perform simple calculations.

Yes, Rurik gave her the method of checking calculations, so that the addition of ten digits was broken into two additions of single digits. She hooked her head and stuffed her head to check the calculations, and her movements were awkward. The strands of blue silk hanging down from her forehead and the braids on her shoulders made her look very cute.

"Ah! How can I feel like tutoring a girl with homework? This girl is worrying enough...that is, she is relatively quiet, very good, very good..."

Lurik just watched her movements, her hesitation when she started writing, and the sudden frowning of her immature face. The results that adults feel sad can easily get, must be a disaster for children.

"Write quickly, don't hesitate."

After , the girl's nervous right hand drew a deep line directly behind the equal sign.

"Erase it and write the answer." Rurik's solemn order made her even more nervous.

She finally finished the ten questions, put the charcoal pen on the ground, stretched out her hands full of toner, and raised her head cautiously: "Masta, I...I'm done."

"Very good. This time you get all the correct answers for the first time."

"Ah I!"

"You made it, Lumia."

Lurik's tense face deliberately smiled, and Lumia's tense face turned into a long-lost smile.

"Up to now you have successfully completed the addition and subtraction calculations within one hundred. You are faster than I thought. I will give you some rewards, Lumia. You should also have a brand new summer outfit. I will buy you one. The most decent piece."

A piece of clothing? Lumia had thought about these things too. Since the little lord had a heart, she immediately knelt down to show her thanks.

"Get up, Lumia. Don't think that completing this is a great victory. Everything is just the beginning. I will start from now and I want to teach you multiplication. There are many knowledge that no one else knows."

In this time and space, the original intention of an ordinary person to take the initiative to learn mathematics is probably to better keep accounts. The boys of the Ross tribe will always follow their father, and when they grow up, they will understand basic mathematics and use them in future life. After all, everyone uses various currencies, which in a sense are actually gold, silver, and copper with different specifications. Using the weight of precious metals to measure prices, the boys, as the future head of the family, do not want to be entrapped by profiteers, so they can only learn arithmetic.

The mathematical knowledge used for ordinary trade is too low-end, it is only the basic arithmetic in complex mathematics.

Mathematics, it can be described as the foundation of various sciences!

In the business dealings between the Ruths and their allies, multiplication and division are not often used.

Lurik is otherwise, he insists on teaching a woman multiplication and division, but also to teach more advanced things, including but not limited to pi, plane geometry, trigonometric functions, solid geometry. And elementary analytic geometry. In short, no matter how much mathematics knowledge can be touched by an Eastern High School student, let this poor Lumia instill it in a short time.

What is the new trick promised father Otto? This is the new trick!

In a short period of time, it is my goal to train Lu Mia into a child with high intelligence.

So, Rurik started to teach Lumia multiplication formulas.

This toner-filled pine board was wiped clean with a linen cloth, and Rurik quickly drew the table and wrote the numbers on the matrix. As long as it is not deliberately wiped off, the multiplication table of this wooden board can naturally be stored for a long time.

Lurik's mission to Lumia is to learn it in the shortest time. First release https://https://

This is a major task. In order to enable her to grasp it earlier, first give her the multiplication formula!

Ancient Nosse, counted from zero to nine, the pronunciation is highly similar to modern English after a thousand years. The pronunciation of numbers in Gnossi also has two syllables, but this is not an obstacle to the implementation of the multiplication formula. On the contrary, because of the two-syllable pronunciation of numbers, the formula can be completely arranged into RAP, and the interesting sense of rhythm is conducive to the memory of learners.

Leurik spent two days before Lumia basically mastered it. After all, she is already a ten-year-old child, although it is the first time to learn, her brain is better developed than a five-year-old child, and is more able to accept knowledge. This is the so-called nine-year-old and ten-year-old child who goes to elementary school for some reason. He can learn all the courses of elementary school in three years and catch up with the progress of junior high school.

Lumia just learned to use the multiplication table. To understand abstractly, the answer can be given quickly under Rurik's question, and it still takes a lot of time to practice.

Fortunately, Lumia doesn't need to learn anything else. She can spend the whole day except sleeping and eating, and even herding time, using this multiplication table to take time to study.

She didn't dare to disobey the little master's orders, she just wanted to understand this hard and boring work early.

She's not a learning robot with no emotions.

A cold and boring day of grazing, the daytime is still short. Now there are no priests to monitor themselves, and no one is worried about running away, and no one helps them manage the deer herd.

The herd of deer has only seen fifteen heads, and each deer has a wooden sign hanging around its neck, and a piece of iron that will jingle when the deer moves.

The deer were slashing away the snow and nibbling grass. Lumia leaned on a pine tree, paying attention to the deer and the planks.

"The deer didn't run away~www.mtlnovel.com~They...what's the matter with them. They are in three piles, each with five heads? Huh? Trefemarfemton."

A section of the multiplication table in the Norse pronunciation version opened her mouth. Now, Lumia opened her eyes wide, as if she had found a baby, and her look at the road completely changed.

From the young master, she learned that multiplication and division can perform more complex operations. She has understood that she has learned knowledge that ordinary people of these tribes simply cannot touch, and the simplest purpose is to help her master manage her more and more wealth in the future.

She couldn't understand the meaning of Rurik's determination for a while, and now the group changes of the fifteen deer leisurely eating grass, she has realized the true meaning of multiplication by herself.

"If the deer herd grows bigger, I will definitely not be able to manage it alone. I have learned multiplication and divided the deer into many small herds, and then I can quickly know how many deer I have! Ah, I'm so smart. No! I stay. Rick is so smart."

The boring study suddenly became interesting. She took the reins of the deer and artificially grouped the deer to verify the correctness of the multiplication table.

The formulas are correct, and her mind is no longer an abstract number, she has become a living deer. She closed her eyes and read the multiplication table silently. In her mind, it was a group of deer performing various pairings and combinations.

Everything suddenly became clear.

The time is February 15th in the Julian calendar, a cold evening, after Lumia happily drove the deer back home. She wiped her hands with the snow, rushed to the priest's longhouse excitedly, found Rurik who was helping Bona and the gang to make soap, and told him that she had completely mastered the multiplication table.