1, the squirrel is going to spend the winter.
Winter is coming, and the little squirrel has to prepare food for the winter.
One day, the little squirrel came to the forest with a big bag on his back and said to Grandpa Pine, Would you please give me your pine cone? Grandpa Pine was generous and said: Pick as many as you want. The little squirrel is very happy. He picked it up and sang. Soon the bag will be full. Grandpa Pine asked: How many did you pick? The little squirrel said, Oh, I forgot! Grandpa Pine smiled and said, "I planted 16 pinecones, and there are nine more. If you can figure out how much you picked, I'll let you carry it. " The little pine tree is in a hurry and can't be counted. What shall we do? If Grandpa Pine won't let him take it away, what will he eat in winter? I will help it.
In math class, the teacher said: knowing the total number and finding the partial number is to remove the known partial number from the total number and get another partial number, which is calculated by subtraction. I soon figured it out that the little squirrel picked 16-9=7 (pieces).
Children, do you know the story of Gauss, a mathematical genius, when he was a child? When Gauss was in the second grade of primary school, once the teacher wanted to have a rest after teaching addition, so he asked the students to do some calculations. The topic is:1+2+3+4 ...+96+97+98+99+100 =? I thought the students would be quiet for a while, but I was about to find an excuse to go out, but Gauss stopped me! It turns out that Gauss has worked it out. Little friend, do you know how he did it? Gauss told everyone how he worked it out: add 1 to 100 and 100 to1; Line up in two rows and want to add, that is:1+2+3+4+………………+96+97+98+99+100+99+98+97+96+……+4+3+. 38+0+10 1+1+101* * has one hundred1kloc-0/,but the formula is repeated twice. Since then, the learning process of Gauss Elementary School has already surpassed other students, which laid the foundation for his future mathematics and made him a mathematical genius.
3, chickens and rabbits in the same cage Have you ever heard of the problem of "chickens and rabbits in the same cage"? This question is one of the famous and interesting questions in ancient China. About 1500 years ago, this interesting question was recorded in Sun Tzu's calculation. The book describes it like this: "There are chickens and rabbits in the same cage today, with 35 heads on the top and 94 feet on the bottom. The geometry of chicken and rabbit? These four sentences mean: there are several chickens and rabbits in a cage, counting from the top, there are 35 heads; It's 94 feet from the bottom. How many chickens and rabbits are there in each cage? Can you answer this question? Do you want to know how to answer this question in Sunzi Suanjing? The answer is this: If you cut off the feet of every chicken and rabbit in half, then every chicken will become a "one-horned chicken" and every rabbit will become a "two-legged rabbit". In this way, the total number of feet of (1) chickens and rabbits changed from 94 to 47. (2) If there is a rabbit in the cage, the total number of feet is more than the total number of heads 1. So the difference between the total number of feet 47 and the total number of heads 35 is the number of rabbits, that is, 47-35 = 12 (only). Obviously, the number of chickens is 35- 12 = 23. This idea is novel and strange, and its "foot-cutting method" has also amazed mathematicians at home and abroad. This way of thinking is called reduction. Reduction method means that when solving a problem, we do not directly analyze the problem first, but deform and transform the conditions or problems in the problem until it is finally classified as a solved problem.
4. Tang Priest and his disciples picked peaches.
One day, the Tang Priest told his disciples Wukong, Bajie and Friar Sand to go to Huaguoshan to pick peaches. Before long, the three disciples returned happily after picking peaches. Tang Priest and his disciples asked: How many peaches did each of you pick?
Bajie said with a silly smile, Master, let me test you. Each of us took the same amount of money. There are less than 65,438+000 peaches in my basket. If we count three peaches, there are 1 peach left in the end. Do the math. How many did each of us choose?
Friar Sand said mysteriously, Master, I will test you, too. If there are four peaches in my basket, there is 1 left in the end. Do the math. How many did each of us choose?
Wukong smiled and said, Master, I'll test you, too. If there are five peaches in my basket, there is 1 left in the end. Do the math. How many shall we each choose?
how much is it?
B. an interesting story about first-grade mathematics
1. The little squirrel is going to spend the winter.
Winter is coming, and the little squirrel has to prepare food for the winter.
One day, the little squirrel came to the forest with a big bag on his back and said to Grandpa Pine, Would you please give me your pine cone? Grandpa Pine was generous and said: Pick as many as you want. The little squirrel is very happy. He picked it up and sang. Soon the bag will be full. Grandpa Pine asked: How many did you pick? The little squirrel said, Oh, I forgot! Grandpa Pine smiled and said, "I planted 16 pinecones, and there are nine more. If you can figure out how much you picked, I'll let you carry it. " The little pine tree is in a hurry and can't be counted. What shall we do? If Grandpa Pine won't let him take it away, what will he eat in winter? I will help it.
In math class, the teacher said: knowing the total number and finding the partial number is to remove the known partial number from the total number and get another partial number, which is calculated by subtraction. I soon figured it out that the little squirrel picked 16-9=7 (pieces).
When Gauss was in the second grade of primary school, once the teacher wanted to have a rest after teaching addition, he asked the students to do some calculations. The topic is:1+2+3+4 ...+96+97+98+99+100 =? I thought the students would be quiet for a while, but I was about to find an excuse to go out, but Gauss stopped me! It turns out that Gauss has worked it out. Little friend, do you know how he did it? Gauss told everyone how he worked it out: add 1 to 100 and 100 to1; Line up in two rows and want to add, that is:1+2+3+4+………………+96+97+98+99+100+99+98+97+96+……+4+3+. 38+0+10 1+1+101* * has one hundred1kloc-0/,but the formula is repeated twice. Since then, the learning process of Gauss Elementary School has already surpassed other students, which laid the foundation for his future mathematics and made him a mathematical genius.
C. 50 words in the first grade math story
Monkey fishing hat
A group of monkeys are playing by the well. A gust of wind blew a monkey's hat into the well. He called 18' s friends and fished for his hats one by one from the pine trees by the well. Four monkeys don't climb trees, so they go for hats. Q: How many monkeys got their hats from the well under the tree?
The short stories of "0" and "1"
In the mysterious kingdom of mathematics, two "secondary numbers", namely "0" of the fat man and "1" of the thin man, often argue endlessly about who is important. Look! Today, these two little enemies meet in a narrow way, and they have launched another war of words. The thin man "1" spoke first: "Hum! Fat' 0', what's so great about you? Just like 100, what's the use of you two being fat without my thin'1'?" Fat man "0" is not convinced: "Don't be overbearing in front of me. Think about it. Without me, where can you find other figures to make up 100? " "hey!" "1" is not to be outdone. "If you are arrogant again, you are nothing. Look! 1+0' is not equal to myself. What's your use? ""go! The result of'1× 0' is not me, and your'1'is also useless! "'0' is tit for tat." You ... "1" paused and improvised. " Anyway, your' 0' is nothing! ""This is your lack of knowledge. " "0" said unhurriedly, "You see, in daily life, the temperature is 0 degrees. Is there no temperature? For another example, without my starting point on the ruler, how can there be'1'?" "No matter how you compare, you can only do the middle number or mantissa, such as 1037, 1307, and you can never lead." 1 "said confidently. Hearing this, "0" said more confidently: "This may be, for example, 0. 1, what can you do without my" 0 "to occupy it?" Seeing the fat man "0" and the thin man "1" all blushed, and no one would let anyone, and other people watching were very anxious. At this time, "9" had a brainwave and made a gesture of pause: "You two stop arguing. Look at you, which number is bigger than me? " "This ..." The fat man "0" and the thin man "1" were speechless. At this time, "9" said calmly: "1" and "0". In fact, as long as you stand together, aren't you older than me? "1" and "0" looked at each other, and it took a long time to scratch their heads and laugh. "That's right! The power of unity is the most important thing! " "No.9 said seriously.
The little squirrel is going to spend the winter.
Winter is coming, and the little squirrel has to prepare food for the winter. One day, the little squirrel came to the forest with a big bag on his back and said to Grandpa Pine, Would you please give me your pine cone? Grandpa Pine was generous and said: Pick as many as you want. The little squirrel is very happy. He picked it up and sang. Soon the bag will be full. Grandpa Pine asked: How many did you pick? The little squirrel said, Oh, I forgot! Grandpa Pine smiled and said, "I planted 16 pinecones, and there are nine more. If you can figure out how much you picked, I'll let you carry it. " The little pine tree is in a hurry and can't be counted. What shall we do? If Grandpa Pine won't let him take it away, what will he eat in winter? I will help it. In math class, the teacher said: knowing the total number and finding the partial number is to remove the known partial number from the total number and get another partial number, which is calculated by subtraction. I soon figured it out that the little squirrel picked 16-9=7 (pieces).
The story of two generations of love
On this day, two generations of love came back from outside riding his beloved little donkey. He saw two people standing in front of his house, one tall and one short.
"Two generations of love are back!" The tall man and the short man can't wait to see him, so that Afandi can find a way to give them the five coppers. Afandi smiled and said, "Ah, gentlemen, I don't know what happened yet. How can I help you? " The two talked for a while, and the two generations of love made things clear. It turns out that these two people cook together today. The tall man took out 200 grams of rice, and the short man took out 300 grams of rice. The meal was ready, and they were about to eat it when suddenly a passer-by came over and asked them to let three people eat the cooked meal. As a result, the three of them finished eating together. Passers-by thanked the tall man and the short man when they left, and left five coppers for the meal. But how can I give five coppers to two people? The short man said that he took three coppers when he gave 300 grams of rice, and the tall man took two coppers when he gave 200 grams of rice. But the tall man said that the five coppers were given to them by passers-by, and they should be divided equally, and each person should take two and a half coppers. When two people figure it out, they don't know how to figure it out
Two generations of love told the tall man and the short man, "This is very simple. In my opinion, it should be divided like this. " The two generations talked about his division of labor: the tall man got 1 copper coin, and the short man got 4 copper coins. The two were very surprised. Later, after two generations told the truth about the split, they were persuaded and left happily.
Children, do you know why two generations of love are divided like this? It turned out to be like this:
Because five coppers are one person's meal and three people eat it, the meal for three people should be 15 coppers. This meal used 500 grams of rice, so the price of 100 grams of rice should be 3 copper coins. The tall man gave 200 grams of rice, which is six copper coins according to the money. When having dinner together, he has to deduct 5 coppers for the meal, so he only deserves 1 coppers. The short man gave 300 grams of rice, which is 9 copper coins by money. He also had dinner together, so he should deduct five coppers from the meal, so he should get four coppers.
D. what is the math story of the first grade of primary school?
Abandon the queen
Once upon a time, there were two chess players playing an exchange game. White players live in the South Pole and black players live in the North Pole. Due to the long distance, the postal efficiency is relatively low. Two people can only take one step a year. After 15, it was the time when Baiqi left. People living in Antarctica took a bold step and abandoned it, which made the situation extremely complicated. A year later, I finally waited for the postman to deliver the letter. He excitedly thought, "Will black chess eat my queen?" My giving up must be beautiful. "
However, when he opened the letter, it said, "The Queen put the wrong box."
Smart dog
A man was walking by the sea and saw another man playing chess with his dog. He was very surprised and went up to the man and said, "I can't believe my eyes." This is the smartest dog I have ever seen! " The chess player said without looking up, "This is stupid." . I won it three times and it beat me 1 game. "
quiet
Former world champion American chess player Fischer asked the court to be absolutely quiet when playing chess, and nothing could happen. 1972 In the World Championship between Fischer and spassky held in Reykjavik, Iceland, Fischer suddenly looked up from the chessboard and shouted discontentedly to the audience watching the chess match:
-/kloc-girls in row 0/2, stop eating candy!
I only ate three pieces.
-Not three dollars, but seven dollars. You think I didn't count it for you!
The king's reward
Legend has it that Indian King Shehan intends to reward Sass Bandal, the inventor of chess. The wise minister knelt before the king and dared to say, "Your Majesty, please give me a grain of wheat in the first box, two grains in the second box and four grains in the third box. At this speed, each compartment is twice as big as the previous one. Your Majesty, give all the 64 grains of wheat like this on the chessboard to the servant? " The king said, "Your request is not high, and you will get it." . With that, he ordered a bag of wheat to be taken to the throne, and the work of counting wheat grains began. ..... Before the 20th cell, the bags were empty, and bags of wheat were transported to the king. However, the number of wheat grains increased rapidly one after another, and it soon became clear that even if all the food in India was taken out, the king could not fulfill his promise to the inventor of chess.
How many grains of wheat should the king give the chess inventor? (1+2+4+8+...+2 to the 63rd power =2 to the 64th power-1= 6544674073709551615 (grain))
E. The math story of grade one is very simple.
Tang Priest and his disciples picked peaches.
One day, the Tang Priest told his disciples Wukong, Bajie and Friar Sand to go to Huaguoshan to pick peaches. Before long, three special disciples came back happily after picking peaches. Tang Priest and his disciples asked: How many peaches did each of you pick?
Bajie said with a silly smile, Master, let me test you. Each of us took the same amount of money. There are less than 65,438+000 peaches in my basket. If we count three peaches, there are 1 peach left in the end. Do the math. How many did each of us choose?
Friar Sand said mysteriously, Master, I will test you, too. If there are four peaches in my basket, there is 1 left in the end. Do the math. How many did each of us choose?
Wukong smiled and said, Master, I'll test you, too. If there are five peaches in my basket, there is 1 left in the end. Do the math. How many shall we each choose?
Tang Priest quickly said the number of peaches he had picked. Do you know how many peaches they each picked?
F. Math Story of Grade One in Primary School
Little Henry comes from a poor family. He goes to the street to shine shoes after school every day to earn money to support his family.
One day, a car stopped next to little Henry, and a fat boss got off.
Little Henry went up to the fat boss and said, "Sir, I can shine your shoes for 10 cents.
The fat boss gave a white look: "No need."
Little Henry blinked and came up with an idea.
"Sir, I am willing to serve you once for free."
"All right, I accept."
When little Henry finished polishing a leather shoe, the fat boss immediately put his other leg in the past.
Little Henry stretched out two fingers to the fat boss: "The second service is 20 cents."
"Then forget it." The fat boss stood up angrily and looked down to find that one of his two leather shoes was bright and the other was not.
In desperation, the fat boss had to sit down again: "I promise to pay 20 cents, and you should polish the other pair of leather shoes quickly."
G. write a short story about mathematics in the first grade of primary school.
My math teaching story
I am a teacher in a dam school in Xiangyun town, and a fifth-grade math teacher. Smart students can basically master it when teaching. Of course, there are very few such students in my class, hehe! But it feels very comforting; Students with weak acceptance have repeatedly said and forgotten how to teach. There are such students in every class, but their anger rises unconsciously. However, today, when quality education is advocated, students have not been screened, and their IQ development is inherently different. In teaching, we should integrate theory with practice, let students observe, think and operate, cultivate their interest in learning mathematics, stimulate their enthusiasm for learning mathematics, and make them feel that mathematics knowledge is everywhere in their lives, and learning mathematics knowledge is full of endless fun. In the usual classroom teaching, my approach is: let the equal, democratic and cooperative teacher-student relationship run through education and teaching. Only when teachers and students have harmonious feelings can students dare to think, ask and speak. In my classroom teaching, I always smile at students, never give lectures with a straight face, and never scold students loudly, trying to respect every student. In the usual teaching, I try my best to express it with actions, try my best to let students learn, learn thoroughly, draw inferences from others, and learn with association. For example, when I teach the rate of progress between length units, let the students say kilometers with their thumbs up. Also tell the progress between them in turn. 1 km = 1000 m, 1 m = 10 decimeter = 100 cm = 1000 mm, 1 decimeter =1. With the passage of time, students learned the speed of progress between length units and the relationship between units. In the days to come, such as studying area units, weight units, RMB units, and unit of volume, as long as you master the rate of progress between units, you can "associate" the skills of length units and the rate of progress between units, making it very easy for students to learn. For example, when teaching students to identify the direction, let them stretch out their right hand and point up to the north, and at the same time say eight directions: up north and down guide, down south, left west, left west, right east and right east ... which can be immediately expressed by gestures, and students can study easily and happily. In teaching, we also contact with eight directions in real life, such as southeast, northwest and so on, to understand the directions. For example, I teach the method of "test business". After calculating two examples, let students think: What about the division of four hours? How to express it with gestures and divide the divisor into five minutes? How to use gestures? Let the students think boldly and speak boldly. Finally, we unanimously decided that the four-shed method can be set to stretch out four fingers first, then bend, then stretch out the thumb, and then convert it into the little finger, saying, "The four-shed method is big and small; Then he created the five-person method, first stretching out five fingers and pushing forward, and then changing from the little finger to the thumb and saying, "Five-person method, big and small." In this way, the classroom atmosphere is very active, students have a strong interest in learning, grasp the knowledge points quickly and well, have a strong interest in learning, have a solid knowledge of mathematics, and like to learn mathematics.
Teacher is a special profession, and its particularity lies in its education, that is, it is a profession with the fundamental purpose of educating people. Teachers have set an example in all aspects. Teachers use their knowledge, talent and noble moral quality to influence students and cultivate them. This educational function is not only manifested in the classroom, but also in the teaching by example. It is necessary to teach people to learn how to be a scholar, how to be a man, and how to "learn to be a teacher and run the world". Teaching by example is more important than teaching by words.