Mathematical story composition in life

Mathematical Stories in Life Composition 1

At the beginning of school, we learned about multiplication and learned to use multiplication formulas to calculate products. Recently we learned about division and learned that division is the average score. For example, 20 children go on a spring outing and are divided into 4 groups on average, with 5 people in each group. The formula is 20÷4=5 (people), where 20 is the dividend, 4 is the divisor, and 5 is the quotient. Read 20 divided by 4 equals 5.

When I was learning multiplication, I already knew that multiplication is used to find the total number. In fact, division and multiplication are opposite calculations. It is relatively simple to learn division on the basis of multiplication. They are also widely used in life. You see: On Sunday, my mother bought 12 oranges. There are 4 people in our family. How many oranges can each person share equally? I can use division to divide evenly, 12÷4=3, and each person can divide 3 oranges. It can also be 3 for each person, and it can be divided among 4 people, 12÷3=4; while eating, my mother said, "Today I cooked 6 dishes in one day, and it cost 50 yuan! Baby, you know How much does each dish cost?" I calculated it in my mind, 50÷6=? I don’t know how to calculate, what should I do? Dad said: "You can think of formulas! Which formula related to 6 is closest to 50?" I slapped my forehead, "I thought of it - six, eight and forty-eight, which means each dish costs more than 8 yuan! Right?" Mom and Dad smiled and said, "That's right! You can use division in many cases in life, but sometimes it doesn't work out exactly. You can find out what the quotient is." Mathematics Stories in Life Composition 2

In daily life, we will encounter many interesting mathematical problems, such as: reasoning problems, period problems, tree planting problems, etc. The kingdom of mathematics is really wonderful and endless, but it often eludes you and even creates illusions!

I remember that when I was in kindergarten, I liked to count the steps while climbing the stairs. My family lived on the sixth floor at that time, and there were 18 steps between each floor. Every time I left home and returned home, I would I have to hold my mother's hand to count the steps. Every time I count, the result is 90. My mother always praises me for being smart.

When I was in elementary school, after I learned simple multiplication, I thought without thinking that I should climb 108 steps every time I go home to the sixth floor. Because I live on the sixth floor, there are 18 steps on each floor. The number of steps, according to the multiplication principle, is 6×18=108 (levels). But in fact, I only need to climb 90 steps to get home every time. At that time, I had a big "?" sign in my heart. I don't know why. So I asked my father, Zhi Duoxing, with a face full of doubts. Dad smiled after hearing this, but didn’t explain anything. He held my hand and came to the first floor, and said with a smile: "Son, think about it, if our family lives on the first floor, do we need to climb 18 steps?" How many steps do we need to climb if we live on the second or third floor? You go up and experience it." After listening to my father's words, I took "?" to experience it again. As a result, I didn’t need to climb the first floor, but I had to climb 18 levels on the second floor, and I only had to climb 36 levels on the third floor. I climbed to the seventh floor in this way, climbing 108 levels. Through these experiences, I suddenly realized and found the rules. Mathematics Stories in Life Composition 3

The purpose of learning mathematics is to apply it in real life. Mathematics is used by people to solve practical problems. In fact, mathematical problems occur in life. For example, when you go shopping on the street, you naturally need to use addition and subtraction, and when building a house, you always need to draw drawings. There are countless problems like this. This knowledge comes from life, and is finally summarized into mathematical knowledge by people, which solves more practical problems.

I once saw a report: A professor asked a group of foreign students: "How many times will the minute hand and the hour hand overlap between 12 o'clock and 1 o'clock?" Those students took off their watches from their wrists , and began to move the hands; and when the professor told the same problem to Chinese students, the students would use mathematical formulas to calculate it. The commentary said that it can be seen that Chinese students transfer their mathematical knowledge from books to their brains and cannot use it flexibly. They rarely think of learning and mastering mathematical knowledge in real life.

From then on, I began to consciously connect mathematics with daily life. One time, my mother pancaked, and there were two pancakes in the pan.

I was like, isn't this a math problem? It takes two minutes to bake one cake, and one minute each to bake the front and back sides. There are at most two cakes in the pan at the same time, so how many minutes can it take at most to bake three cakes? I thought about it and came to the conclusion: it takes 3 minutes: put the first and second cakes into the pot at the same time. After 1 minute, take out the second cake, put in the third cake, and put the first cake in. Flip the cake over; bake for another 1 minute so that the first cake is ready, take it out. Then put the opposite side of the second cake and turn the third cake over at the same time, so that everything is done in 3 minutes.

I told my mother this idea, and she said that it would not be such a coincidence, there must be some errors, but the algorithm is correct. It seems that we must apply what we have learned so that mathematics can better serve our lives.

Mathematics should be learned in life. Some people say that the knowledge in books now has little connection with reality. This shows that their knowledge transfer ability has not been fully exercised. It is precisely because they cannot understand and apply mathematics well in daily life that many people do not pay attention to mathematics. I hope that students can learn mathematics in life and use mathematics in life. Mathematics is inseparable from life. If you learn it deeply and thoroughly, you will naturally find that mathematics is actually very useful. Mathematics Stories in Life Composition 4

On August 4th, I wanted to go to the movies with my good friend Maomao. Because I was worried that August 4th would conflict with the remedial class, I wanted to look at the calendar, but, There was no calendar in the new home, so I asked my mother to look at the calendar on her phone. Unexpectedly, my father next to me interrupted: "Based on the knowledge you have learned, I believe you can figure out what day of the week August 4th is." I thought for a moment and answered: " Today is July 17th, Sunday. There are 31 days in July. 31-17=14, 14÷7=2, which is exactly two weeks. August 1st is Monday, so August 4th is naturally Thursday. "Here." My mother asked while the iron was hot: "What day will August 4 be next year?" I blurted out: "Of course it is Friday!"

< p> "Because next year is a leap year, February will have an extra day."

"Wrong answer! The phone shows that August 4 next year is a Sunday! Saturday -"

This time it was my turn to be confused. There was obviously one extra day in February, not two extra days. Where did the remaining day come from? The family thought for a long time but couldn't come up with an accurate answer. I thought about it and wrote a whole piece of paper but couldn't figure out an accurate answer. When I was frowning, suddenly, my mother's words changed my life. Thoughts and ideas. I saw my mother frowning and muttering, "There are three hundred and sixty-five days in a year and seven days in a week." Ah! My idea is right, but how could I forget that there are seven days in a week? There are exactly 366 days from August 4 this year to August 4 next year (because next year is a leap year), so let 366 be divided by seven , there are exactly two days left, doesn’t it just happen to be Saturday? I told my idea to my mother, who was very happy. I also happily calculated what day of the week my birthday and my parents’ birthdays will be next year, and even what day of the week next year’s New Year’s Day will be!

Yes, mathematics is everywhere in life. As long as you learn to discover mathematics and study the mathematics in life, you will definitely discover many mysteries in mathematics. If you study hard and discover seriously, your mathematics will definitely improve. Very soon, let’s discover the mystery of mathematics in life together!

Dad joked: "Chenchen, there is no need to buy our calendar, you can just use it as our calendar!" Dizzy! Composition 5 of Mathematical Stories in Life

——Mathematical Stories in Life

“The Animal Party has begun!”

“The Animal Party has begun! ”

There was a lot of noise in the Forest Stage Theater, and the animals were huddled together. Some parents found their seats, but the parents who couldn’t find their seats were angry. It rises higher and higher.

Look, the always quiet mother rabbit is also a little crazy at this time, jumping and jumping, her eyes are red; the father monkey, who is wearing glasses and is very gentle, has his glasses squeezed out, leaving only A thread connected to the glasses swung back and forth on her chest; the elegant mother cat even wore a special dress, but as a result, there were a few black footprints on the low skirt, and she kept complaining in her heart about why the child didn't say anything. clear.

If you step forward and ask at this time, you will laugh: What kind of seats are these children talking about?

Little Rabbit: I sit on the fifth column of the third column.

Little kitten: I sit at (3, 4)

Little monkey: I sit in the second column and sixth row.

The position Little Rabbit mentioned is definitely wrong. The vertical and column meanings are the same. Where is she sitting? The little cat is wrong either - the seat she mentioned is already occupied. And what about the little monkey? The seat he described had a hedgehog sitting on it!

Don’t laugh yet! In fact, they just got the meaning of columns, rows, and the order of number descriptions wrong. Let’s talk about Little Rabbit first: She said she was in the fifth vertical position of the third column. Column and vertical both mean the same thing - column, but she confused the vertical and row meanings. It should be said that she The seats are in the third row and the fifth row. The columns are vertical and the rows are in a row.

Let’s look at the mistake the kitten made - (3, 4), and her real seat is (4, 3) - the fourth column, the third row. The kitten misunderstood the order of the numbers: the first number represented the column, and the second number represented the row.

And what about the "little monkey"? He thought that the two columns were in one column, so he thought that they were one column, so he said that he was sitting in the second column and in the sixth row. Whether two columns are joined together or not, they are two columns, not one. If it becomes a row, there is no way to determine the seat, so the "little monkey"'s seat is in the fourth row and the sixth row.

Dr. Owl heard about this and made up a formula for these little confused people:

It is very important to find the correct position, arrange vertically and horizontally.

Numbers are represented by brackets, columns first and then rows.

Don’t mix up the order of before and after, otherwise it will cause a big joke. Mathematics Stories in Life Composition 6

One day, my mother and I went to the mall. My mother went into the supermarket to buy something and asked me to wait for her at the pay area.

I had nothing to do, so I just watched the salesperson collect the money. As I looked at it, I suddenly found that the money collected by the salesperson was 1 yuan, 2 yuan, 5 yuan, 10 yuan, 20 yuan, and 50 yuan. I felt very strange: why did the RMB not have 3 yuan, 4 yuan, and 6 yuan? What about yuan, 7 yuan, 8 yuan, 9 yuan or 30 yuan, 40 yuan, 60 yuan? I quickly ran to ask my mother, and my mother encouraged me and said, "Use your brain and think about it. Mom believes you can figure it out for yourself." I settled down and thought about it carefully. After a while, I jumped up happily: "I know, because as long as there are 1 yuan, 2 yuan, and 5 yuan, you can arbitrarily form 3 yuan, 4 yuan, 6 yuan, 7 yuan, 8 yuan, 9 yuan, as long as There are 10 yuan, 20 yuan, and 50 yuan that can also be composed of 30 yuan, 40 yuan, 60 yuan..."

My mother nodded after hearing this, and asked me another question: "If it is just to be free. If it’s a combination, wouldn’t it be enough to only use 1 yuan? Why do we need 2 yuan or 5 yuan?” I said, “It’s not convenient to use only 1 yuan to form a larger number.” Now my mother showed up. He smiled with satisfaction and praised me for being able to observe and use my brain. Hearing this made me feel more comfortable than eating my favorite ice cream.

Here, I also want to tell other children: In fact, there are mathematical problems everywhere in life. As long as you pay more attention and use your brain to think, you will make a lot of unexpected discoveries. If you don’t believe it, just Give it a try!