The Contents and Texts of Math Handwritten Newspaper in the Fourth Grade of Primary School

Introduction # Primary School Olympiad # Handwritten newspaper refers to a newspaper that publishes news information in handwritten form with paper as the carrier in the development of journalism. It is the embryonic form of newspaper, also known as handwritten news. The following is the related information of "The Content and Text of Mathematics Manuscript for the Fourth Grade of Primary School" compiled by Connett, hoping to help everyone.

1. Contents and texts of the fourth-grade mathematics handwritten newspaper.

The problem of train running in the opposite direction Two trains run in the opposite direction along the same track, and the speed of each train is 50 miles per hour. When the distance between two cars is 100 mile, a fly flies from train A to train B at the speed of 60 miles per hour. When it meets the train B, it immediately turns around and flies to the train A, and so on until the two trains collide and crush the fly into pieces. How far did the fly fly before it was squashed?

We know that the distance between two cars is 100 miles and the speed of each car is 50 miles per hour. This means that each car travels 50 miles, which means that two cars collide in an hour. During the short time from the train to the collision, the fly kept flying at 60 miles per hour, so when the two cars collided, the fly flew 60 miles. Whether the fly flies in a straight line, along the "Z" line or rolls in the air, the result is the same.

2. The fourth grade primary school mathematics handwritten newspaper content text

Euler, Swiss mathematician, member of the Royal Society. Euler was fascinated by mathematics since he was a child. He was an out-and-out mathematical genius. He became a student in university of basel at the age of 13, got a master's degree at the age of 16, and was promoted to a professor at the age of 23. 1727, he was invited to work in the Academy of Sciences in St. Petersburg, Russia. Overwork blinded him. However, this did not affect his work. Euler has an amazing memory. Hydrogen said that a fire in St. Petersburg in 177 1 reduced his large collection of books and manuscripts to ashes. With his amazing memory, he dictated and published more than 400 papers and many works. Euler was a mathematical superstar in the18th century. He made great contributions in the fields of calculus, differential equations, geometry, number theory and variational science, thus establishing his position as the founder of variational method and the pioneer of complex variable function. At the same time, he is also an excellent popular science writer, and his popular science books have been reprinted for 90 years. Euler is the most prolific mathematician ever. It is said that his precious cultural heritage was enough for all the printing presses in St. Petersburg to be busy for several years at the same time. As one of the four mathematicians who contributed to mathematics (the other three are Archimedes, Newton and Gauss), Euler is known as "Shakespeare in mathematics".

3. The fourth grade primary school mathematics handwritten newspaper content text

How many socks can be made into a pair? The answer to the question of how many pairs of socks can be matched is not two. And not just in my house. Why is this happening? This is because I can guarantee that if I take out two socks from the drawer on a dark winter morning, they may never be a pair. Although I am not very lucky, if I take out three socks from the drawer, I will definitely have a pair of socks with the same color. Whether this pair of socks is black or blue, there will be a pair of the same color in the end. In this way, with the help of an extra sock, the mathematical rules can overcome Murphy's law. It can be concluded from the above situation that the answer to "How many socks can make a pair" is three.

Of course, this only applies when socks are two colors. If there are three colors of socks in the drawer, such as blue, black and white socks, if you want to take out a pair of socks of the same color, you must take out at least four socks. If there are 10 socks of different colors in the drawer, you must take out 1 1 socks. According to the above situation, the mathematical rule is: if you have n types of socks, you must take out N+ 1 to ensure that you have the same pair of socks.

4. The fourth grade primary school mathematics handwritten newspaper content text

There is a treasure on an island. You see three islanders, big, medium and small. You know the big islander knows whether the treasure is on the mountain or under the mountain, but sometimes he tells the truth and sometimes he lies. Only the middle islanders know whether the big islanders are telling the truth or lying, but the middle islanders themselves tell the truth when the previous person tells the truth, and when the previous person tells a lie, they tell a lie. The two islanders raised their left or right hands to show their agreement, but you don't know which hand indicates agreement and which hand indicates disagreement. Only the island knows. But he always tells the truth or lies, and you don't know which of these two types he is. Can you ask whether the treasure is on the mountain or under the mountain with the least questions? Tip: If you ask an islander where the treasure is, he will ask you how to know where it is. Equal to asking in vain)

answer

For convenience, we call the big, middle and small island people ABC (actually, we don't use C language). The first question is A: Is the treasure on the mountain? The second question is B: Is A correct? The third question is B: 1+ 1 = 2, right? Ok, now the first question is that we don't know whether A answered "yes" or "no", and we don't know whether A answered "yes" or "no". We only know whether A raised his hand with his left hand or his right hand, so let's leave him alone. Look at the second question. No matter whether A's answer is "yes" or "no", as long as A's answer is correct and B answers correctly in the second question, then he should answer "yes" (if he can speak Chinese). Still the same. No matter whether A's answer is "yes" or "no", as long as A's answer is wrong and B's answer is wrong in the second question, he should still answer "yes". So anyway, B's raised hand means "yes"; The third question: Now that we know what the right hand means, as long as we know whether B's answer just now is true or false, we can determine whether A is true or false, because the truth of both must be the same. So just ask any question, such as 1+ 1=2, right? There is another way: First, ask a random person: Are you telling the truth? That person will definitely raise his hand for yes, because if he is telling the truth, he will raise his hand for yes, and if he is lying, he will also raise his hand for yes, so we can draw a conclusion that the hand represents yes and ask China islanders: Did the big islanders say that the treasure is on the mountain? China islanders must have answered correctly, which means that the treasure is where China islanders said.

Because if the China islanders say that if the big islanders are telling the truth, then the China islanders are telling the truth, then the treasure must be on the mountain. If the big islanders are lying, then the China islanders are also lying. In fact, the big islanders mean that the treasure is under the mountain, but because it is fake, the treasure is still on the mountain.

5. The fourth grade primary school mathematics handwritten newspaper content text

In our concept, "1" is the smallest number, which is the starting number of an integer and the first number of ten thousand. Yes, "1" is the first number of ten thousand, and its position is also the most special. Let's get to know this magic number together. First, the smallest number.

The ancient and huge family of natural numbers consists of all natural numbers 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. The smallest one is "1", which cannot be found. You can look for it if you are interested.

Second, there are no natural numbers.

Maybe you think you can find a natural number (n), but you will immediately find another natural number (n+ 1), which is greater than n. This shows that you will never find a natural number in the family of natural numbers.

Third, "1" is indeed the smallest in the family of natural numbers.

The natural number is infinite, and "1" is the smallest of the natural numbers. Some people disagree that "1" is the smallest natural number, and think that "0" is smaller than "1" and "0" should be the smallest natural number. This is wrong, because natural numbers refer to positive integers, and "0" is a non-positive and non-negative integer, so "0" does not belong to the family of natural numbers. "1" is indeed the smallest one in the family of natural numbers.

Don't underestimate the smallest "1", which is the unit of natural numbers and the first generation of natural numbers. Humans first recognized "1", and only by using "1" can we get 1, 2,3,4. ...

I told you the special status of "1", which is one thousandth, so don't underestimate it.