After my cute childhood friend cheated on me, the school beauty begged me for forgiveness.

"I also want to understand this type of problem. Let's do it together. What if we can solve it?" Gu Chen guided her to give it a try.

"...Oh." When she heard that Gu Chen also wanted to understand this question, Su Rou'er responded obediently, and then immediately used the table top as a blackboard and knocked twice. She really looked like a teacher, "What do you want to do? If so, Teacher Su can take you to try."

In fact, she felt that she would still not be able to solve such a problem if she tried it again.

But it's okay.

As long as I can be with Brother Chenchen, I will be motivated!

"Look, Xiao Gu, I remember the answer says like this, we must first establish the relationship at this point on the y-axis..." Su Rouer squeezed into Gu Chen's arms, held the pen holder in her little hand, and began to explain on the draft paper. While telling Gu Chen the question.

Smelling the fragrance in her hair, Gu Chen occasionally moved his gaze from her little hands to the side of her chubby face.

This girl is so cute even when she is serious.

"... Use the equal angles to prove that the two lines ab and cd are parallel, and then, uh... then, then I don't know how to do it?" Su Rouer, who has very clear logic, explained this big mathematical problem in detail The steps to solve the first two questions are all written down in the notebook.

But in the end, the most difficult question got stuck again.

"I understood the first two questions. Teacher Xiaorou'er taught well." Gu Chen nodded and praised.

"Now you know how powerful the teacher is, right?"

"Yeah." Gu Chen was still squeezing her soft little face as he pondered. This was a twelve-point question. If he didn't answer the most difficult question, he would probably only get half of the points.

In subjects like mathematics, the gap between you and others is widened in terms of difficult problems.

Just when he was about to encourage Su Rouer to continue, this enlightened girl took the initiative to take over the pen, "Wait a moment, Brother Chenchen, I will try again to see if I can figure it out..."

Su Rouer got serious.

In the past, if I was lying alone on a small desk, even though sometimes I was in good condition and I was like taking a shot of chicken blood to answer the questions, but when I encountered a difficult problem that was so obscure that the whole class couldn't understand it, I would probably just take a second look at it. I didn't have the courage to continue.

But this time.

When she thought that Gu Chen was watching her by her side, her morale instantly became high. She wrote half a piece of draft paper, and she seemed to be in the state of solving the problem.

"Now, now, I think it can be done using this idea..." Su Rouer became a little more confident.

can.

Ideal is full, the reality is very skinny.

As she wrote, her little eyebrows slowly came together, "Eh..."

"..." Gu Chen, who had expected this scene for a long time, raised his lips. He went back to memorize and do the questions every night for dozens of days, and the results were outstanding.

In these few minutes, he had used his computer-like brain to figure out the answer in his mind.

Mathematics is a subject that is linked to each other. As long as there is a problem in one step, the entire question is probably a zero.

On the other hand, as long as you figure out the key points, you will be able to solve the problem quickly.

But Su Rouer hasn't seen what her problem is yet.

"Oh, this is a bit difficult, Chenchen... Xiao Gu, I may have to wait until Monday to ask the real teacher before I tell you..." Su Rouer's face was bulging, and she spoke honestly. own shortcomings.

Although she knew that asking the teacher to explain could solve the problem, she still felt a little frustrated because she couldn't immediately give the answer to Gu Chen.

The first time I became a teacher, the first time I became Brother Chenchen’s teacher, I lost the first battle.

How can this work?

At this moment.

Gu Chen took the simulation question and started talking, "This kind of question with graphics may require three normal vectors. Do you want to establish a system on the negative half-axis of the y-axis and try it again?"

"...Hmm." In his encouraging eyes, Su Rouer thought about it and picked up the pen again, "Okay, I haven't tried this idea yet."

Originally, I had an attitude of trying.

But until several coordinates that were completely impossible to calculate were solved so easily, Su Rouer raised her eyebrows with a look of surprise in her eyes.

"Xiao Gu, it turns out you are a bit smart! Teacher Su almost didn't realize it..." She showed her starry eyes and touched Gu Chen's hair pretending to be pleased.

It was as if he was reminded by Gu Chen's words that he discovered the essence of this question.

"I'm just talking casually, you keep writing, and you'll teach me when you finish." Gu Chen turned his head to avoid the attack of her little hands, put his hands on the back of his head, and leaned leisurely on the table behind him.

Hidden strength and name.

"Brother Chenchen, I still can't seem to figure this out..." Su Rouer's journey to solving the problem was very bumpy, and now she no longer wants to act like a little teacher, and lies on the table helplessly.

Gu Chen glanced at her steps and said, "Try to calculate the angles of these two planes first."

"Oh." Su Rouer asked questions one after another, "There is still a problem in calculating this normal vector, Brother Chenchen."

"You little fool, you calculated the coordinates wrong."

"...Hmm! It seems so! I didn't notice it even if you didn't tell me." Su Rou'er held the scrap paper and became more and more confident, but she still didn't forget to defend herself: "Brother Chenchen, I'm not a little fool!"

"Little fools usually don't admit that they are little fools."

"..."

Gu Chen couldn't talk enough about it, so he didn't dwell on this issue for too long.

Su Rou'er twisted left and right, and after a lot of tossing, she finally squeezed to Gu Chen's side with a draft book full of steps to solve the problem, "I figured it out, I figured it out!"

"Well, it's worth encouraging." Gu Chen took the draft book and read the steps above, and his mood was infected by her light laughter.

After just giving her a few pointers, she was already very good at solving such a difficult problem.

I guess this girl is not so naive when it comes to her studies.

"Eh? Isn't it right?" Su Rouer, who was being rubbed by Gu Chen, took a while to realize that something was wrong.

According to the imaginary script, I should have taught Gu Chen how to do the questions, and when he got it right, I would have rubbed his head to encourage him.

Why am I still the one being rubbed now?

Su Rouer looked at her notebook, and then at Gu Chen, who seemed to be checking the steps for her to do the questions. She was a little confused.

"Brother Chenchen, shouldn't I be the one teaching you how to do the questions? Now...why does it seem like you are teaching me how to do the questions?"

"You were the one who taught me, okay? This is all your fault."

"It still doesn't seem right, Brother Chenchen, the steps and formulas just mentioned were all told to me by you when I didn't remember them." Su Rouer suddenly felt that Gu Chen had become more powerful again. He actually remembered so many formulas. Knows better than she does.

Gu Chen pretended not to understand, picked up the book and shook it in the air, "Didn't you write all the steps to solve the problem above?"

"Hmm...it seems right, but..."

"Stop it." Afraid of damaging this girl's confidence as a primary school teacher for the first time, Gu Chen changed the subject.

Putting the draft book back on the table, he pointed his finger at the table and said, "Come on, Teacher Xiao Rou'er, tell this question to your students again."

While Su Rouer was explaining the topic to him, he went over her shortcomings again.

"It's so cute." Su Rouer moved closer to the stool and picked up the pen again, "Look, Xiao Gu, for this question we have to start from the origin of the coordinates..."

"You little idiot, you made a mistake. Start from the negative half axis of the y-axis."

"oh oh……"

Su Rou'er, who was rewarded with a head bump, rubbed her head, blinked twice, and suddenly looked at Gu Chen with confusion, and then looked at the question.

Something doesn't seem right, but I can't quite put my finger on it.

Could it be that I'm really not very smart?