Mathematical composition

Math Composition 1 Teachers often say that there is math 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 our brothers eat hamburgers. Think 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 get something, just like eating hamburgers.

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!

Math Composition 2 Students, in life, math 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 is: if you want to multiply 500 by multiple digits, just multiply 500 twice and then multiply it by the multiplicand, and then divide the product by 2. Like 500? 448628, put 500 first? 2= 1000 and then 448628? 1000=448628000, and finally 448628000 divided by 2=2243 14000. Second, if you encounter the end-to-end calculation problem, you can do it skillfully: multiply the number on the tenth place by the product of the number on the tenth place plus 1, then multiply it by 100, and finally add the products of the two numbers on this place. For example: 53? 57=? How's it going? Have you figured it out? It's actually quite simple. How about (5+ 1) first? 5=30, then 30? 100=3000, and finally 3000+3? 7=302 1, have you mastered this trick?

Mathematics is really wonderful! In the future math study, I will work harder and master more skills.

Math Composition 3 I like reading the math 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 thieves 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 to learn math well by rounding. How convenient!

In life, mathematics is really an indispensable good friend. I love math, and I will try to learn it well in the future!

Math Composition 4 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, 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, and 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 is it equivalent to? I said, let me do the math. I couldn't remember for a long time, so I had to ask my father. Father replied: buy two and get one free, that is, 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 to buy 150 yuan's milk, so 100 divided by 150 is equivalent to a discount, and 100 divided 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 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!

Math Composition 5 I saw a math problem in my life in my math textbook today. The topic is: GJ 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 the 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.

1300000000? 1000? 200=260000000 (gram)

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 dad: 1 ton of water can generate how many kilowatt hours? 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.