Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Mathematical tabloid
Math content 1 National Day holiday, our family came to Hualian Department Store. First, let's buy clothes for dad. Dad picked out a dress that he particularly liked. It's just a special discount of 20% during the National Day. Dad asked me that the price of a dress is 150 yuan, and a 20% discount is equivalent to multiplying the price of the dress by 0.8. Do you know how much a dress costs? I think: 150 times 0.8, it is better to divide 10 of 150 by 15, 0.8 times 10 equals 8, and then multiply 6, 15 times 8 equals1. Dad asked, "Why?" I told my father the process of solving the problem. My father said, "Yes, there is another way: 0.8 times 10, 150 times 8 equals 1200, and then click a decimal point to get 120."
After buying clothes, we went to the supermarket on the ground. My father said to me, "The dairy products in the store are on sale. If you buy two boxes, how much discount? " I said, "Let me do the math." I couldn't think of it for a long time, so I had to ask my father. My father replied, "Buy two get one free is to spend two boxes of milk to buy three boxes of milk." A box of 50 yuan is equivalent to spending 100 yuan to buy 150 yuan's milk, so dividing 100 by 150 is equivalent to a discount, and dividing 100 by 150 is equal to 0.6, and the result is between 6.5 and 7 fold. You got it? "I said," Oh, I see. I understand now! " "
On my way home, I also sent out many questions and discoveries about life mathematics, such as story height, cross-sectional area, solar water capacity, national flag accuracy and so on!
This is the mathematical discovery of my life. I believe there are more math problems waiting for us!
Mathematics Content 2 In our daily life, everything is inseparable from mathematics, which shows how close mathematics is to us.
For example, mom goes to buy fruits and vegetables, goes to the publishing house to reply to the manuscript ... and so on, all of which need math. There are many interesting mathematics in life, waiting for us to discover and explore.
During the summer vacation, my parents and I went to my cousin's house to play. I was thirsty on the road, so my father had to buy mineral water from the nearby grocery store. There is a rule in the grocery store: if you buy three bottles of mineral water, you can exchange one bottle of mineral water, and the price of one bottle of mineral water is 1 yuan. When my father saw it, he took out 10 yuan and gave it to the grocery store owner, saying, "The boss bought 10 bottle of water." When I got the water, I drank it hungrily, and soon I drank two bottles. Before I came to my senses, there were several empty bottles. Dad asked me, "Lingling,1how many bottles of mineral water can 0 yuan exchange?" I think: I drank 10 bottle of water, 9 empty bottles were replaced with 3 bottles of mineral water, 3 empty bottles were replaced with 1 bottle of mineral water ... and there were two empty bottles left. I happily said to my father, "Dad, I have worked it out. Yes 14 bottle of mineral water, and there are 2 empty bottles left. " Dad smiled and said, "Think again!" I said thoughtfully, "We can borrow an empty bottle from the grocery store owner and return it to the boss after drinking it. Oh! We can drink 15 bottles of mineral water. " Dad nodded in praise.
Mathematics is to use it flexibly and integrate theory with practice. Only by mastering the knowledge of mathematics can mathematics serve us better. So we should learn mathematics well and make mathematics a good helper in our study and life.
Math Content 3 The annual food festival is coming again. I took my parents by the hand and followed the joyful crowd to the food court. The festival square is a sea of people and a world of food.
There is no place to sit and eat, so we can only eat while buying. A string of fish balls is two yuan, and my mother gave me ten yuan. I bought three strings and got back 4 yuan. Then I wanted to eat chicken legs, and my mother stood by and looked at me with 100 yuan. I bought three from a woman in Hubei with confidence. I think three times five equals fifteen. Then, 15 minus 100 equals 85. I told my mother, do you want 85 yuan back? My mother looked at me with a smile. "Why?" I explained it, and then as expected, she gave me 85 yuan back. I am happy in my heart, learning mathematics has such a great role that I need it everywhere. After eating delicious food, we went shopping again My mother took a fancy to warm sheets and bought a big bed and a small bed. 38 yuan, the elder, and 28 yuan, the younger. Mom gave 100 yuan. Mother said, "Now, how much should I get back?" I cocked my head, snapped my fingers, calculated, and whispered, "Get back 34 yuan." "Mom said," Why are you whispering? " "Because I don't know if it's right." "Self-confidence is the first step to success, son.
If you want to learn math well, you need to have faith besides interest ... "I caught a glimpse that she gave her mother 35 yuan and was about to say another piece. Her mother had already given her 1 piece. I frowned, but on second thought, I figured it out. This is the mathematics in life. Mathematics is closely related to life. In the future, I must study math more seriously.
Mathematics content 4 should attach importance to learning and understanding mathematics from students' life experience and existing knowledge. Because life is inseparable from mathematics, and mathematics is inseparable from life. Especially in primary school mathematics, we can get the mathematical prototype in our daily life. When we students drink porridge, we have a lot of familiar math knowledge around us. For example, we have to add and subtract when shopping, and we always have to draw pictures when decorating new houses ... There are countless such problems. This knowledge comes from our daily life, but those are "living" math textbooks!
In the past, students learned mathematics knowledge mechanically, and transferred that knowledge directly from books to their brains, which was rarely applied flexibly to real life. But it's very different now. Students have learned to apply mathematics to their lives. For example, I once went to my classmate's house to play, and my classmate was alone at home. Early in the morning, we were all hungry, so my classmate ran into the kitchen and began to cook breakfast by himself. At first, the classmates washed rice and put it in the pot, and then began to cook porridge. Then bake three cakes while cooking porridge. He first put the first and second cakes in the pot. A minute later, he took out the second cake, put it in the third cake, and turned the first cake over. Bake for another minute, so that the first cake is ready. He took it out, put the reverse side of the second cake in the pot, and turned the third cake over at the same time. In this way, it only takes three minutes, and three cakes are baked, so that he can cook other dishes in the remaining time of porridge cooking. If he is cooking and doing nothing else, isn't it a waste of time? Then he won't lose much! Therefore, life cannot be separated from mathematics, and mathematics cannot be separated from life.
Students, let's explore the mystery of mathematics and discover mathematics in life!
Mathematics content 5 As the saying goes, you get something for nothing. There is mathematics everywhere in life. As long as you are willing to do it, there are many practical examples.
People are familiar with the RMB and have to deal with it almost every day. However, few people pay attention to why there are only three denominations of RMB: 1, 2 and 5, and there are no other denominations.
In fact, there is a mathematical truth here. As a currency in circulation, when issuing RMB, banks should consider that the number of currency notes should be as small as possible, and the nine numbers 1 to 9 should be easily formed. This can not only fulfill the monetary mission, but also reduce the complexity in circulation. Through careful selection, 1, 2 and 5 stand out and become one of the best combinations. Because the three numbers 1, 2 and 5 can form any other number within 10, and only three votes are used at most, for example, 1+2 = 3, 2+2 = 4,5+1= 6,5+2 = 7.
In addition, in addition to the combination of 1, 2, and 5, there are also combinations of 1, 3, and 5 that meet the first two requirements, and any other number within 10 can also be formed with it, such as 1+ 1 = 2, 3+6544.
After reading the above analysis, are you interested in this math problem around you? In fact, there are still many interesting math problems in life waiting for you to dig and explore. ...
Mathematics Content 6 Mathematics is indispensable in life. Whether shopping or working in an office, it is inevitable to calculate and use your brain. In fact, some problems in mathematics will also be encountered in life. With the growth of grade, you will find that almost all the problems you have learned in mathematics exist in your life.
For example, during the Chinese New Year, the factory will give each employee a bottle of salad oil and buy 80 bottles, which is 20 boxes. Two shopping malls, A and B, are engaged in activities. I bought 4 bottles (1 box) of salad oil at a shopping mall, and each bottle was 38 yuan. Buy two bottles of salad oil in the second shopping mall, and get a free coupon for 5 yuan, each bottle is also 38 yuan. Is it cheaper to go to Mall A or Mall B? Then let's do the math. A: 80 times 38=3040 (yuan) 20 times 38=760 (yuan) 3040-760=2280 (yuan) /B: 80 divided by 2=40 (bottle) 38 times 5= 190 (yuan) 80 times 38=3040. Look, from this math problem, we know that we should "shop around" in the future.
In fact, mathematics in life does not stop there. Scientists study a series of things, using mathematics, of course; Doing business is also cautious, otherwise you will lose money; Even if you count the stars, you should use numbers.
The mystery of mathematics is like a road, which attracts people to find it, but it often doesn't tell you the answer, so let you find it yourself. Right or wrong, it won't remind you, let you judge for yourself. As long as you enjoy it, what will you find?
Mathematics Content 7 In our life, many mathematical problems are often involved. As long as you are diligent in thinking and good at discovering and summarizing, you can solve many problems around you.
One day, my mother gave me nine coins and said, "Here are nine coins, and one of them is fake. Can you find fake coins? " I said, "It's not easy!" I accepted the task.
I look around. It doesn't seem to make any difference. I knocked with something again, and the sound seemed the same! What shall we do? I thought about it, oh! With a balance, the weight of real money and counterfeit money is definitely different! Mom smiled and gave me a weightless balance. She said, "Well, counterfeit money is lighter, but I only have a balance without weight. Try to find fake coins. "
I divide the coin into three parts first, and then put one on each side of the balance. The balance is not reflected. I don't think counterfeit money is in these two copies. But I'm not at ease. I picked up the left one from the balance and put the third one on it. There was no response at first, but then the left end slowly tilted up. Oh, the fake coins are in the three coins on the left. I took out two coins on the left, which seemed to weigh the same! "I see, counterfeit money must be that!" I cried. "Yes, it's great that you can use your math knowledge to solve math problems in your life!" Mom said.
In fact, I just solved this problem with simple mathematical knowledge. And it only needs to be weighed twice to find a counterfeit coin from nine coins.
Therefore, there is mathematics everywhere in life. We should not only study the knowledge in textbooks, but also pay attention to the mathematics in life. If you apply what you have learned in mathematics to your life, you will find that mathematics is so interesting.
Mathematics Content 8 Mathematics and Life Before Rui-qi Li in Class 6 (4) of Xiaolingwei Central Primary School, I always thought that mathematics was a very boring thing, but it was that that changed my view on mathematics. It was this summer. One day, it was very hot. After work, my father brought back a big round watermelon. Looking at the beautiful black and green stripes, my mouth watered and I volunteered to cut watermelons.
I'm just about to accept it all. "Slow down ..." Dad said, "I will test you in two ways: first, you eat a quarter of a watermelon; I'll eat a third of this watermelon, a quarter for my mother, a fifth for your little cousin and the rest for you. Which one do you choose? " I heard a fifth, but I didn't even think about it. I said loudly, "I choose the second one!" " "Dad smiled and said," think about it. "I think it over. Isn't this the least common divisor? The lowest common divisor of one third, one quarter and one fifth is 60. One third plus one quarter plus one fifth equals 47 out of 60, which means I can only eat 60 13, and one quarter equals 60 15. Of course, I should choose the first one!
So I was a little embarrassed to say to my father, I didn't think clearly just now, but now I know I should choose the first one. "Ha ha, it doesn't matter, just want to know. Come on, you can cut the watermelon. Everyone is fair, one quarter each! " I cracked two knives, and the big west was divided into four pieces, revealing the red flesh. Take a bite. This melon is so sweet! From this incident, I understand more and more that mathematics is really closely related to our lives.
Math Content 9 "Drawing a Wall" is a math activity class, so we should pay attention to students' learning process. In mathematics teaching, we should pay attention to revealing the methods of forming all kinds of knowledge and show the thinking process of learning new knowledge, so that students can discover the truth and master the law through the thinking process of perception-generalization-application, so that students can develop a variety of thinking methods in the teaching process of this paper and develop their knowledge and thinking ability. This content is a process of comprehensively demonstrating students' comprehensive application of knowledge, rather than general knowledge teaching. It needs to use in-class and out-of-class time, combined with in-class and out-of-class survey results for centralized application, so time is not limited to one class.
This content is a highly comprehensive and demanding activity for students, which is reflected in the mastery of thinking, operation, basic knowledge and comprehensive ability. The activity of painting the wall is a comprehensive test for students in the above aspects. I found that although students can accomplish their tasks well in groups, the design of this part of the content follows the principles of breaking things into parts, dispersing difficulties, breaking them one by one and cooperating in groups, so for each individual student, there is a lack of sense of wholeness, which will be compensated in practice.
Math Content 10 In math class, Teacher Zheng gave us a question: A cuboid, if it is 2 cm higher, will become a cube. At this time, the profile product increased by 56 square centimeters. Excuse me, how many cubic centimeters was the original cuboid?
I cried and the class exploded.
"Ha ha, this is not simple? Counting the five added faces, is it not enough to calculate the length of the original cuboid? "
"Yes, yes, only four sides were added, but no five!"
"I feel the same way ..."
Teacher Zheng saw that the master had his own way, clapped his hands and said, "Master, be quiet! In that case, why don't we draw a picture? Maybe you can find the answer from it. "
As soon as the voice fell, the students picked up their pens and drew on the draft. ...
"All right, class, does the master of drawing know how many faces he has added?"
"Four!"
"Yes, in fact, the original cuboid is now a cube. We only need to divide the increased area by the number of increased faces to get the area of a face. So, the formula is—
"56 divided by 4!"
"Well, we know that the most important thing to calculate the volume of a cuboid is its length, width and height. We can calculate the length of a cuboid by dividing the area by the height. Does the master know how to find the width and height? In fact, it is very simple, because the height of a cuboid can be changed into a square by adding 2 cm, so the length can be reduced by 2 to get the height. But what about the width? The master looked at the question carefully. When a cuboid becomes a cube, its width does not change, so its width and length are the same. Ok, will the master? "
"yes! 56 divided by 4 divided by 2 equals 7 cm, bracket 7 MINUS 2 bracket multiplied by 7 multiplied by 7 equals 245 cubic centimeters! "
After listening to the teacher's careful comments, I finally understand, will you?