Primary school "burning brain Problem"-even graduate students are ignorant, you try?

Recently, a netizen will be such a math problem to send Internet, apparently he was puzzled by this problem, so asked: "This is ordinary primary school third grade examination questions?" ”......

This primary school math problem is how difficult, many netizens this time is "experienced", n version of the solution, but there are a variety of calculations, many people do is dizzy.

After reading the question, how much did you have to come out?

This problem, then aroused the interest of netizens, but also puzzled a lot of netizens, some people look at the problem, someone directly handed "blank".

Netizen "Xavi Chen": High school graduation I said to this problem powerless.

However, most netizens still start the brain, the answer of course also followed, did not expect there are several answers, there are said to be 12, there are said 9, also said 6, and even appeared 8 and 2. 9 and 12 of the most, however, whether 9, or 12, the correct answer is only one, exactly which is right, some netizens also debated.

"Ham_is_not_handsome" said: "Horizontal groove, I was drunk, so simple a primary school problem, a look is 9, calculated out of 12, or excusable, 6 is how to calculate out?"

Netizens "X_ZL-NB" to do "and the Matter Guy", for this smooth said: All kinds of answers looked drunk, 12,9,6 are positive solutions.

In order to prove that they are correct, many netizens will also solve the problem of the solution to the "sun" out, there are decomposition patterns after the calculation, but also the use of equations to solve, and even netizens use the tutor machine.

The reporter tries also to calculate again, the first time calculates is also 12. But soon by the side of a colleague to overthrow, he said, according to the decomposition algorithm, should be 9, which is the square of two right angle intersection two of the long line is four small rectangular shared.

How can there be different answers, how hard is this problem? Reporter found a few university graduates of science and engineering test, just graduated soon Mr. Ye Kou, confidently say the number 12. He said, this is a square pattern, which has a total of 6 equal length lines, so the circumference of 18 divided by 6 to the original large square of the length of the side, and then multiplied by 4, of course, 12.

Similarly, is also a famous university science graduate students of the public Kim, also with such an algorithm to get the answer 12. Different people have made different answers, and with 12 and 9 the most.

In fact, the correct answer is 9. How do you answer this question? Yesterday, the reporter asked for advice to the education reform in Zhejiang Province Star, Wenzhou City Shishi Rookie, PO Shoes City Primary School senior teachers Chutzeli.

Qiu teacher told reporters that this topic did not appear in the primary school textbooks, should belong to the outside of the subject matter, is "super outline" problem. The original learning base of this problem is solved by the understanding of the rectangular perimeter.

The meaning of this problem is to give students a better understanding of the perimeter and the correct concept of perimeter. But the problem for ordinary pupils have a certain degree of difficulty, but the top students can do it. The correct solution is actually not too difficult, if the four small rectangles divided out from the paper, it is very easy to understand that, since each of the two edges of each small rectangle is inside the large square, the other two equals the length of the side outside, and the outer sides add up to the circumference of the large square, So these 4 small rectangles Zhou Changzhi and, divided by 2, are the circumference of the original square.

Adults are from elementary school students come, the answer to the question is not difficult, but why some people feel so difficult, and even use the middle school, high school math problem solving methods to find the answer.

In this regard, teacher Qiu thought, this is an adult to complicate the subject. When confronted with many problems, adults often use the existing mathematical knowledge to answer. For example, you can do advanced math problems, suddenly appear a simple math problem, you will certainly use advanced thinking to think about how to solve the problem. In the face of mathematical problems, one method can not be solved, often think of another idea to answer.

As parents must understand the intention of the teacher, the main test students what things, testing students to learn the knowledge of the degree and so on. But parents are not familiar with these, so they do not understand, often think that the teacher out of the problem is too difficult.

Although parents can sometimes use their own methods to solve the problem, to find the correct answer, but this for the children, he did not understand, parents also teach not to understand children.

Encounter similar students will not do the topic, as parents do not worry, students to take over the topic, there must be a source. Sometimes, some teachers will give a number of topics conducive to the development of thinking, decorate a weekly question, so that students spend a week to think about a topic. The teacher's intention does not involve parents in solving the problem, but it is also a way to encourage children to ask their parents questions.

If the topic is the teacher layout, will not do, do not worry, you can ask the teacher. If it is outside the teacher layout, can also find the layout of the teacher. If it comes from extra-curricular books, as parents try to encourage their children to think. As parents, must learn patience, learn to wait, you can listen to the child's idea of the topic, if the children do not understand the topic, parents can use their own understanding of the way to tell children, let children learn to think, to think.

There are a lot of problems in the primary school like this. Mr. Qiu introduced that in the elementary school stage slightly complex mathematics question, one is the law question, two is the graph question, three is needs and the life actual combination can answer the question, is lets the student and the parents feel more difficult questions.

On the topic of graphics class, mathematics has a relatively classic one question: "A square cut off a corner of a few horns left?" "Many parents can't answer this question completely," he said. and the subject of experience, there are more classic topics, such as: "There is a well deep 11 meters, a snail from the bottom of the climb, 5 meters in the daytime, the night down 2 meters, asked this snail a few days to climb out of the well?" "The crux of this problem is that students need to master a certain mathematical thinking and life experience, the combination of both can be correctly solved, otherwise it will be prone to error."

Qiu teacher said, although these topics are not textbooks, but let children in extra-curricular contact with these more flexible topics, or very good, can improve the child's thinking ability.