Mathematics is our old friend. The thought and application of mathematics, numbers and everything are one of the themes of the third season open science class! The following is a review of my open class of Logarithm and Mathematics of Everything (10) for your reference. Welcome to collect and share!
Mathematical thinking on number and everything and reflection on the open class of applied science (1 article) Since primary school, my math scores have been very unstable and I have been in the middle of my class. But it is this "stability" that makes me drift away from mathematics.
In junior high school, the difficulty of mathematics is also increasing bit by bit. Mathematics has gradually become a subject that gives me a headache.
Every day in class, I explain to the teacher at a fast speed. Before I could understand this problem, the teacher had already started to talk about the next one. By the time I finished copying the first knowledge point on the blackboard, the teacher had written the second knowledge point. Faced with such rapid learning progress, I simply have no time to digest and absorb the contents and knowledge points spoken by the teacher. The harder I study, the more I resist math.
Although I had some resistance to mathematics, I didn't hate it at that time. What really makes me hate math is because of a "homework incident".
In math class that day, I didn't understand what the teacher said at all, so I had to teach myself when I got home at night. I tried to read what the teacher said in the book carefully and tried to implement the examples in the book. The homework assigned by the teacher that day, I didn't start writing until I thought I had made up what the teacher said in class that day.
The next day, I handed in my exercise book with excitement, which was the "brilliant achievement" of my self-study overnight. Just when I was expecting the teacher's praise, I was greeted by a big "C" in my exercise book.
It was this time that I completely lost confidence in mathematics.
But then my math scores suddenly improved and I had some confidence in math. The reason is very common, just because after the "homework incident", the teacher asked me for "tea" and taught me a lot of tricks to learn mathematics. Now my math scores have improved a little. I began to like math.
Now I really love and hate math. I hate it, because this little guy makes me study math very hard, and it takes me a lot of time and energy to study it. Maybe I was born with normal rational thinking. Love is math, let me learn to work hard and stick to it. Mathematics not only taught me these things, but also honed my will. Maybe that's why I love and hate math.
Mathematical thinking of number and everything and thinking of open class of applied science (II) In the colorful mathematics kingdom, we have long been tired of teachers' inculcation. Now, the math teacher has changed the teaching method and made me fall in love with math.
The teacher always likes to let us learn while playing when giving us lessons. We learn knowledge in happiness. Although we learn the same as before, we are happy. The teacher thinks he is just a little older than us, which makes us feel that he is no longer a serious math teacher, but a lovely and naughty child. He has been carefree in class, and now a series of boring math problems have popped up. Just like a series of delicious food tempts us, we are gluttonous and try our best to eat delicious food before temptation. Mathematics is a huge magnet, and we are his small pieces of metal.
We are a group of "mathematical geniuses". We will conquer Chen Jingrun. It is mathematics that allows us children to find the sail and not lose our way. We like classrooms full of laughter, teachers like us, jumping numbers, and magical words.
Mathematical thinking on number and everything and thinking on the open course of applied science (3) Today, my father and I were walking in the community, and my father suddenly asked me, "What is the sum of the internal angles of the triangle?" " 180 "
I said without thinking. "Then, what about the sum of the internal angles of the quadrilateral?" Dad keeps asking me. "Quadrilateral? Well, 360. " I am still very confident. "Hexagon? Have you found any rules? " Dad continued to inspire me. "Hexagon ... 720, is it regular?" I drew a picture on the beach with branches. "Suppose this polygon has n sides, is the degree = 180× (n- 1)?" I have no confidence to say. "So, let's check it. Suppose n = 3,3-1= 2,2×180 = 360, and the triangle is 360? " "No, what is it?" I'm confused. "Otherwise, Baidu?" "No, I want to think for myself." I refused because of my strong self-esteem. When I got home, I continued to think about this interesting math problem, and suddenly I remembered what the math teacher told us, arithmetic progression, a high school. Just try it. I continue to calculate on the manuscript paper. "Oh yeah! I figured it out! " I am ecstatic. I searched online, and my answer is exactly the same! I found an interesting rule! Students, do you know what the answer is? The answer is as follows: 180× (n-3)+ 180 or 180 times (N-2).
Mathematical thinking about numbers and everything and thinking about open courses of applied science (4) 20__ year165438+1Saturday, October 24th, sunny yesterday's math class was the most interesting. Rinrin Bell! The bell is ringing, class, you won't let me. I won't let you sneak into the classroom. I saw the math teacher pattering along at a brisk pace. The game started, and everyone raised their hands many times. Game 1: I'll make it smaller. The students crowded together, and then put out two feet, one is straight and the other is curved, so the game began.
The first game: Pig looks at the alarm clock. I started to perform, and the Monkey King came on stage and got an alarm clock. The Monkey King showed it to me. He asked, "9: 30?" I said, "Half past six." The Monkey King said, "Wrong." I said, "Yes, yes." The Monkey King touched his scalp and said, "That's right." I said, "Ha ha! You are wrong! " The teacher added, "Now, the students are all wrong." Suddenly, the bell rang. The students ran out of the classroom like a gust of wind.
"Mathematical Thinking on Numbers and Everything" and "Comments on the Open Course of Applied Science" (Chapter 5) have always said that mathematics is closely related to life, and sometimes I really can't understand it. Today, I saw such a topic:
One day, Max plans to go back to his hometown to visit relatives during the holiday. His hometown is in Fujian, and now he is in Zhenjiang. He will go back by train.
There are two trains:
The first class is from Zhenjiang to Nanjing, passing through Anhui Province, Jiangxi Province and then to Fujian.
The other one passes through Shanghai, Zhejiang and Jiangxi provinces and goes directly from Zhenjiang to Fujian.
Train ticket price:
The fare from Zhenjiang to Nanjing is 20 yuan, half an hour. The train fare from Nanjing to Fujian is 1 14 yuan, which takes 18 hours.
Due to the different models and routes, the direct train fare from Zhenjiang to Fujian is 256 yuan, which takes 19 hours.
Max began to calculate. Finally, I decided to take the train from Zhenjiang to Nanjing and then to Fujian.
According to its calculation, the train from Zhenjiang to Nanjing and then to Fujian needs 134 yuan, and takes 18.5 hours. The train from Zhenjiang to Fujian goes straight to 256 yuan, which takes 19 hours. It saves time and money to take the train from Zhenjiang to Nanjing and then to Fujian.
The dog Max bought a train ticket. After the holiday, I went home to visit my relatives.
Mathematics is so important that we must learn it well. Most things in life need to be solved by mathematics.
Mathematical thinking on number and everything and reflection on the open course of applied science (Chapter VI) Teachers often say that there is mathematics everywhere in life. In life, many ordinary trivial things can be turned into interesting and thought-provoking math problems. The math problems we often do are to solve problems in life. No, I found an interesting math problem while eating hamburgers:
It takes three minutes for three people to eat three hamburgers, and how many minutes for nine people to eat nine hamburgers?
My mother often takes my brother and me to eat hamburgers. I only know how to eat hamburgers. I never thought it could become a math problem. It's really interesting to encounter this problem. At first I thought: It takes three minutes for three people to eat three hamburgers. It's not a minute for one person to eat one hamburger, and it's not nine minutes for nine people to eat nine hamburgers. I was so excited to think about it that I quickly told my mother the answer. But my mother frowned and said, "Son, think about it. Think about how we and my brother eat hamburgers. Use your head more! " "
I was shocked, and my pride just now disappeared. I calmed down and thought about it. It suddenly occurred to me that it takes three minutes for three people to eat three hamburgers. In fact, it takes three minutes for one person to eat one hamburger and three minutes for nine people to eat nine hamburgers. I didn't tell my mother the answer at once, but thought it over several times. I didn't tell my mother the answer until I thought it was all right. My mother nodded and smiled and praised me as a child with brains. She added, "Mathematics comes from life. As long as you observe carefully, you will definitely get something, just like eating a hamburger. "
Look, a little thing in life can also become an interesting math problem. Mathematics is really everywhere! Let's love math and learn it well!
Students, in life, mathematics has brought us many benefits, such as quick calculation when buying food and counting things.
Whether you are like me in math study, you will encounter some interesting discoveries. Now I will introduce some of my findings.
Can you calculate with your mouth? Let me teach you some clever calculation methods. The first one: If you want to multiply 500 by multiple digits, you just need to double 500, multiply it by the multiplicand, and then divide the product by 2. For example, to calculate 500×448628, divide it by 500×2= 1000, then divide it by 448628× 1000=448628000, and finally divide it by 448628000 and divide it by 2=2243 14000. Second, if you encounter the calculation problem of "head-to-tail consistency", you can do it skillfully: multiply the number in the tenth place by the product of the number in the tenth place plus 1, then multiply it by 100, and finally add the products of the two numbers in the unit. For example: 53×57=? How's it going? Have you figured it out? It's actually quite simple. Calculate (5+ 1) ×5=30, then 30× 100=3000, and finally 3000+3×7=302 1. Have you learned this trick?
Mathematics is really wonderful! In the future math study, I will work harder and master more skills.
Thinking about Mathematics of Number and Everything and Open Course of Applied Science (Chapter 8) I like reading the mathematics book written by Grandpa Li Yupei very much. A math commander makes me enjoy it, a math journey to the west makes me memorable, a math zoo makes me fondle admiringly, and the adventures in this math kingdom make me forget all about eating and sleeping.
The protagonist Tintin is very good at mathematics. He was invited to visit the curved kingdom, and his friend Beckham wanted to go, so they came to the curved kingdom together. Here they went to the dangerous math palace, the terrible wildlife park, played interesting math rings and were cheated by a "thief" once. In this process, Beckham, who is not good at math, encountered many difficulties. While knocking down difficulties, he also fell in love with mathematics and improved his math scores.
I used to think I was good at math, but after reading this book, I felt that I was not good at math, because I couldn't do many math problems in the book, and I didn't understand them thoroughly even after reading the answers and analysis. While slowly understanding these problems, I also learned a lot of knowledge: there are some laws that are difficult to find, binary and decimal systems that make me feel convenient, the golden ratio of people, and pi that makes me feel difficult. Through this book, I have a deep understanding of mathematics and truly realize that mathematics is a delicate and interesting subject.
In life, mathematics is everywhere. When buying food, giving money for money is math; When paper-cutting, the size and area of paper are mathematics; When eating, it is math to distribute food evenly to everyone. I remember when I first bought food, I carefully calculated the accounts while picking the dishes that my parents and I loved, and the last sum of money was not wrong; At that time, I took money to the supermarket myself, made good use of the money and bought a lot of good things; Another time we went to take a taxi, I found that the driver's uncle asked for an extra dollar by rounding ... it's so convenient to learn math well!
In life, mathematics is really an indispensable good friend. I love math, and I will try to learn it well in the future!
Thoughts on Mathematics of Numbers and Everything and Thoughts on Open Courses of Applied Science (Chapter 9) During the 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, preferably 150 divided by 10 equals15,0. 8 times 10 equals 8, then multiply, 15 times 8 equals 120 yuan, and the result is 120 yuan. I am happy to say to my father, "Yes 120 yuan!" Dad asked, "Why?" I told my father the process of solving the problem, and my father said, "Yes, there is another way to solve the problem." . 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 the money of two boxes of milk to buy three boxes of milk." A box of 50 yuan is equivalent to spending 100 yuan on 150 yuan's milk, so 100 divided by 150 is equivalent to a discount, and 100 divided by 150 is equal to 0. 6, the result is 6. Between 50% and 70% off, do you understand? "I said," Oh, that's it. I understand now! " "
On the way home, I also sent out a lot of mathematics in life, such as: the height of the floor, the area of the outline, the water capacity of solar energy, the accuracy of the national flag and so on.
This is the mathematical discovery of my life. I believe there are more math problems waiting for us!
Mathematical thinking on number and everything and reflection on the open course of applied science (article 10) I saw a topic "Mathematics in Life" in the math textbook today. The topic is: "China's population is about 654.38+0.3 billion. If we save 654.38+0 cents per person per day, if so, our country will save about 6.5438+0.3 million yuan. If primary school students need to save about 65438+ tens of thousands of dollars from grade one to college, then this money can be provided to 1805 children who are out of school and have no money to go to school. Wouldn't it be nice to give these money to those people? "
After reading the above information, I thought: many hands make light work. Suddenly I remembered, many hands make light work? Not good, because I thought about it: if this population of about 65.438+300 million wastes 65.438+0 drops of water, then a * * wastes about 65.438+300 million drops of water, then what do you think is 65.438+300 million drops of water?
I did a small experiment: I put 1000 drops of water under the tap and weighed them with a scale. The weight of 1000 drops is 200 grams. I wrote another calculation.
130000000÷1000× 200 = 260000000 (g)
260000000 grams =260 tons
I really don't know, it's shocking: if everyone uses one ton of water a month, then 260 tons of water can be used for two years. I went to ask my father, "How many kilowatt hours can a ton of water generate?" Dad said, "1 ton of water can generate 100 kwh of electricity." This means that 260 tons of water can generate 26,000 degrees of electricity.
Wow! I was shocked at once. 260 tons of water can play so many roles! So we should save all the water now, don't waste a drop of water, we should form a good habit of saving, and we can't waste any more.