I, go to the parent-teacher meeting for my eldest niece!

Seeing me Wang Yi doing it so quickly, Director Sun’s face showed a look of disdain, let alone do Olympiad questions, even if you do ordinary questions, you have to think about it, right?

Wang Yi did it so quickly, either memorizing the answer in advance or writing blindly.

This test paper was just given to Wang Yi by Director Sun, and if there is no such thing as memorizing the answer in advance, then Wang Yi must be writing blindly.

“Hmph, another ignorant child, talking to you is simply a waste of my time!”

After Director Sun blindly and arbitrarily identified Wang Yi, he didn’t bother to look at the test paper and criticized Wang Yi at a glance.

Zhang Qianqian wanted to call the shots for her uncle, and handed Wang Yi’s test paper to Director Sun: “Please, let’s see if my uncle is doing it right before talking nonsense, if my uncle does it right, aren’t you slapping yourself in the face when you say this?” ”

“Do it right? Do you think it’s possible? On this paper, it takes ten minutes to take out a random question, and this kid actually completed all the questions in ten minutes, do you think he can do it right? ”

“Don’t talk so much, look at the question first!”

Under Zhang Qianqian’s urging, Director Sun reluctantly picked up the test paper that Wang Yi had just made.

Director Sun originally planned to crumple it into a ball at a glance and throw it into a garbage basket.

However, when Director Sun took a look, he was directly stunned.

——

1. A project was originally planned to be done by 40 people and completed in 15 days, if it was to be completed 3 days earlier, how many additional people were needed? （10）

2. Xiao Wang, Xiao Li, and Xiao Zhang do math practice problems, half of the number of questions Xiao Wang does is equal to 1/3 of Xiao Li, equal to Xiao Zhang’s 18, and Xiao Zhang has done 72 more than Xiao Wang, how many Xiao Wang, Xiao Zhang, and Xiao Li each do? （24/36/96）

3. A and B jointly complete 242 machine parts, it takes 6 minutes for A to make a part, and 5 minutes for B to make a part, when completing this batch of parts, how many parts did each of them make? （110/132）

……

——

There is a large calculation process behind each question, but Wang Yi did not calculate at all, and directly came out with the answer, and even the unit behind the answer was too lazy to write.

After correcting all the answers, Director Sun’s hands holding the test paper became trembling: “You… You…… Did you remember the answer before? ”

“What do you think?”

Wang Yi asked rhetorically.

Director Sun felt so embarrassed, this test paper was just handed to Wang Yi, he knew that there would be no possibility of remembering the answer in advance, but he still asked like this, which seemed a little ignorant.

But if Wang Yi didn’t remember the answer in advance, and did it so quickly, then…

“Little friend, can you tell me how you did it so quickly?”

Director Sun’s attitude towards Wang Yi changed dramatically by 360 degrees, revealing a smile that he thought was amiable.

Director Sun is usually serious inside, and when this smile is revealed, he is like a butcher hiding a pig-killing knife behind his back.

“Please, take back the horrible smile, I’m panicking!”

Zhang Qianqian grinned and said all the words in everyone’s hearts.

The surrounding students couldn’t help but laugh when Director Sun was so stunned when they saw that they couldn’t help but laugh.

Director Sun withdrew his smile awkwardly, but still asked Wang Yi: “Little friend, what did you do?” Do it right and fast, it’s a god! ”

“This question is so simple that you can’t do it slowly.”

“Too easy?”

Wang Yi’s sentence was too simple, and all the students who were devastated by the Olympiad cried.

The corners of Director Sun’s mouth twitched constantly.

“yes, it’s so easy.”

“How can such a difficult question be so simple?”

“Isn’t that easy? are some of the most basic equation problems in junior school, at most a binary or ternary one-time problem, not even a one-dimensional two-time question, let alone the more difficult binary two-dimensional and one-dimensional three-time questions, it’s really simple to die. ”

Hearing Wang Yi’s words, the students around were confused to death, what one yuan twice, two yuan once, they have never heard of ah.

Primary school students only know the equations x and y, and they are quite uncomfortable, and when doing these problems, they are generally done in conventional methods, which is simply difficult to die.

Director Sun has been teaching primary school students, in order to better teach primary school students, he rarely uses equations, all rely on calculations, and the junior high school knowledge is almost forgotten.

“Little friend, tell me what to do with this question?”

Director Sun pointed to the first question: A project was originally planned to be done by 40 people and completed in 15 days, if it was to be completed 3 days earlier, how many additional people would be needed?

Director Sun can do this question, but he just wants to see how Wang Yi does it.

“How simple this is, simple as 1.”

While speaking, Wang Yi picked up the pen and wrote down the steps to solve the problem for Director Sun:

X more people are needed

(40+x)(15-3)=40*15

x=10

After writing, Wang Yi added a sentence: “It’s that simple, it’s not difficult at all.” ”

The students in the Olympiad class all gathered around Wang Yi, and everyone was stunned when they saw Wang Yi’s two lines come to the result of this question.

When they were doing this question, they were struggling to break their heads, and they didn’t know how many lines they wrote.

Wang Yi got it in two lines, this is really a person compared to a dead person.

Although Director Sun taught elementary school, he also went to university, and because he has been teaching elementary school, he fell into the thinking of elementary school students.

Seeing Wang Yi doing these elementary school Olympiad problems from the perspective of a junior high school bully made him suddenly cheerful, as if he saw a shortcut for primary school students to quickly learn Olympiad.

“Little friend, you can help analyze how to do this problem!”

Director Sun struck while the iron was hot and hurriedly pointed to the second question: Xiao Wang, Xiao Li, and Xiao Zhang did math practice problems, and half of the number of questions Xiao Wang did was equal to 1/3 of Xiao Li’s, equal to Xiao Zhang’s 18, and Xiao Zhang did 72 more than Xiao Wang, how many Xiao Wang, Xiao Zhang, and Xiao Li each did?

“It’s a super simple three-dimensional equation problem, which is a little more difficult, but not too difficult.”

Wang Yi said while writing in the space below this question:

Set Xiao Wang to do X road, Xiao Li to do Y Dao, and Xiao Zhang to do Z Dao

1/2x=1/3y=1/8z

z-x=72

x=24，y=36，z=96

In just three lines, Wang Yi calculated the difficult problem that this group of students could not understand if they wanted to break their scalps.

“What about this question?”

Director Sun pointed to the third question: A and B jointly completed 242 machine parts, A took 6 minutes to make a part, B took 5 minutes to make a part, when completing this batch of parts, how many parts did each of them make?

“It’s a regular binary primary equation…”

While speaking, Wang Yi wrote out the calculation process:

Let A do x and B do y

y=242-x

6x=5y

x=110

y=132