The previous chapter ended in a hurry, and now I am filling it up.

"Class guide, 9÷3 (2+1), what is it?" asked a student with glasses.

"Are you mistaken? The elementary school question also asked, do you still need to eat milk! Eat your hands!" Su Gong almost didn't make the movement of sucking his fingers. The group was amused, and the student who asked was as red as an apple.

"This student is asking a math problem, math is a rigorous subject, just like the egg and the egg just now, one more word and symbol may have different results. The No. XXX (I don't remember what it was called) spacecraft failed to launch because of the wrong symbol entered. (It seems that there is a story!) Can Dou Si come on stage to write this formula?" Xia Du tapped the podium with chalk.

Dou Si: Destroy the weakest students in a class, be bullied to the point of autism, and can only use study to numb yourself.

With his head down and his face red, Dous wrote 9÷3 (2+1) on the blackboard. "This is obviously equal to 9! Count the parentheses first, and then from left to right, 9÷3×3=9, just ask me such a simple question!

"There is a key point in this question, that is, whether there is a multiplication sign between 3 and parentheses. If it is written, it is 9÷3× (2+1), so as Sugun said, first the parentheses and then from left to right is equal to 9. Xia Du added a multiplication sign to the formula.

"But let's look at this formula. Xia Du erased the added multiplication number. "There is no multiplication sign in this formula, so 3 (2+1) is a whole, and the multiplication distribution rate is used in this case, bringing 3 into parentheses, =9÷(1×3+2×3)

＝9÷（3+6）

＝9÷9

=1" Xia Du solved step by step on the blackboard.

"Because the multiplication sign between numbers cannot be omitted, it is omitted here, so this equation is actually 9÷3X, (1+2) is an unknown number, although we can see at a glance that it is equal to 3, in the case of omitting the multiplication sign, 3 (1+2) means 3 times the unknown number (1+2) so the answer is 1"

The above is a personal opinion, and it is best to run an authority to say that this question is wrong.

"Class guide, the dog is so cute and spiritual, as the dog ancestor's roaring dog, why did he bite Lu Dongbin?"

"There is a saying after the break, the dog bites Lu Dongbin - I don't know the hearts of good people. Why did the roaring dog bite Lu Dongbin, this question involves mythological stories. "Don't ask if there is such a sentence in the copper plane, because the author wants to write it.

"Pure Yang Patriarch - Lu Dongbin, this immortal is very famous, we all know that he is a merry immortal. The most famous is the three-play white peony. Xia Du gave a brief introduction to Lu Dongbin.

"As for why it bites, it starts with Lu Dongbin's previous life, no, his previous life. Lu Dongbin's previous life was the Duke of Donghua, also known as the Emperor of Donghua, and it was not much of the peach blossom one. Emperor Donghua is the head of male immortals, and the head of female immortals, the Queen Mother of the West is husband and wife! It is important to say it three times, so it is said that the Jade Emperor and the Queen Mother are not husband and wife! Not husband and wife! Not husband and wife!" Xia Du emphasized continuously.

"The palace of Emperor Donghua is on the sun, and the palace of the Queen Mother of the West is on the moon, which is later known as the Guanghan Palace. Later, the sun and moon were truly incarnated. The sun incarnates Emperor Jun and the Eastern Emperor Taiyi, and the moon transforms Xi and Changxi. After the transformation, they entered the Sun Palace, killed the Emperor of Donghua, and then formed the Demon Heavenly Court, and the Queen Mother of the West ran to Daozu for refuge. Then specially created the arrow of Hou Yi to shoot the sun. ”

"After the death of Emperor Donghua, he was reincarnated as a Donghua immortal. It's a pity that the Jade Emperor has already ascended the throne at this time, and can only be the guard of the South Heavenly Gate. He is still husband and wife with the Queen Mother of the West!, so you know why the white peony was demoted!"

"Now you understand why Lu Dongbin is called Pure Yang Patriarch! ”

"After talking about Lu Dongbin, let's talk about the roaring dog, the roaring dog is also called the tengu, the tengu has a book, the tengu swallows the sun, and the tengu eats the moon. Lu Dongbin, who has the pure yang true qi of the sun, is a fragrant meat and bone in its eyes. Xia Du's explanation made the class laugh.

ZAKE LOOKED AT XIA DU AND FELT THAT XIA DU WAS QUITE CAPABLE OF PULLING IT.

"Class guide, my girlfriend asked, and at the same time fell into the water, save her first or save my mother first? "It seems that the destruction class has gotten along well with Xia Du, and this question is asked.

"Legally speaking, children have an obligation to support their parents and have an obligation to help, but they have no obligation to help their girlfriends. ”

"If a girlfriend and a mother are in distress at the same time and the mother can be rescued, but the mother is not rescued in order to save the girlfriend, if the cause of the crime cannot be ruled out, it constitutes a crime of omission. ”

"That is to say, when you can only save one, the state wants you to save your mother. ”

"Answer like that, will my girlfriend be angry with the splitter!"

"If, in this case, you will take the opportunity to divide it, this has not yet entered the house and is already jealous with the future mother-in-law, and when you enter the house, you will not make a fuss, and the family is unfortunate. So for the girls here, please don't ask this kind of question. ”

"Class guide, what would you do if your boyfriend answered you like this!"

"First of all, I don't ask this kind of question, even if I ask with a cramp in my head, then use force to resolve the disagreement. Xia Du suppressed the class for a second.

At this time, all of them realized again that Xia Du could crush them. So they all became honest.

"Alright, now we should be able to start classes. "The time is almost up, Xia Du began to teach.

"What about the whip? if you don't have a whip, let's just make one!" Xia Du didn't find the whip.

Xia Du came to the window and pointed at the branch outside the window, a branch was directly broken, Xia Du snapped his fingers, and the broken branch flew directly into Xia Du's hand.

Xia Du waved the branches, and the distant branches and leaves were thrown away. Xia Du tried it, and it was quite suitable. With a hard grip, flames erupted from Xia Du's palm, and the flames were strung quickly, instantly submerging the entire jumping branch. Wait for the light to recede. The branch in Xia Du's hand turned into an anomaly.

Xia Du's Temporary Whip: Xia Du's hand-crafted anomaly. effect, leaving a brief light on the blackboard.

Xia Du's hand-making technique once again shocked the class, and even ZASE was stunned.

The next day, Xia Du went to class as usual. When he walked into the classroom, Xia Du found that the atmosphere was not right.

"Classmate Sun Guangguang, what's wrong with your mouth?" After Xia Du observed, he found that there was a black mark on Sun Guangguang's mouth, and he was beaten to bruise at this time.

"I couldn't sleep last night hungry, so I went to Ultimate Street to buy supper, but I was beaten more than 100 times by a crazy woman with a weapon in the same part, and I broke all the muscles and veins of swearing, and I am already a waste person who can't swear. Sun Xiaofatzi said sadly.