That morning, during recess, I was playing on campus when I suddenly heard the cry of "Woo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo-hoo. Who is crying? I walked over and saw that it was a little sister of eight or nine years old crying. I went up to him and asked him kindly and anxiously, "Little sister, why are you crying?" She finally stopped crying slowly, wiped the tears on her cheeks and sobbed, "That little brother just now, he was running on the road. I didn't see him. He almost knocked me down." He scolded me and said, "You blind man, can't you see that uncle is walking?" He also gave me a hard push. I cried in pain, and he said,' Cry!' ..... "I quickly took out a handkerchief to wipe her tears and comforted her by saying," Okay, okay, don't cry. I will accompany you to find him. " Her heavy rain finally stopped.
After some efforts, I finally found the bad guy. I looked up and saw that it was a big brother in grade five. His body is as strong as an ox. Although I was a big sister in the fourth grade, I was still very timid. Seeing that he is so strong, my legs are weak with fear. But our teacher said to take good care of our little classmates, and "fear" seemed to run away again. I plucked up my courage and boldly walked up to him and said, "I'm afraid." He stared at me with big eyes and said fiercely, "That blind thing has moved reinforcements!" " ""you blind thing! " "How dare you talk to Lao tze like this! "He waved his fist at me and I was afraid again. What should I do? I had a brainwave and said to him, "You must apologize to this little sister, or I will tell the teacher in your class for you!" " "I think he didn't move, and he really went to the teacher's office. He thought I was afraid to tell the teacher, so he just stood there staring at me. I ignored him and went straight to the office. I'm going to the office soon. He saw that I was really going to tell the teacher that I was in a hurry, so he quickly ran over and took my arm and said, "I'm sorry, I was joking with you." I won't bully my classmates again. Please forgive me. " I proudly said, "I forgive your mistake. Don't bully your classmates again!" " I dare not do it again. "I smiled happily.
I tell you this secret, not to let the teacher praise me, but to let everyone care about and love my little classmates. I hope everyone can be Lei Feng and help others, so that our campus will be more harmonious and happy.
2. The mystery of discount Discount is a way to make profits and reduce prices in commodity sales, and it is a way for sellers to give preferential prices to buyers. Discounts usually appear in shopping malls and bookstores.
Some places to buy and sell things.
Sometimes, some people will be attracted by discount stores, but often, a single item of the same style will appear in different stores, and both items will be discounted, but the discount methods are different, resulting in different final prices. So you must use the method of calculating the discount price or the last one to get more profits before you can buy what you like. I remember one time, my mother took me to the mall and said that she would help her sell a coat.
We took the elevator to the second floor. Wow! The women's dresses here are really dazzling, with everything! We went shopping first, and my mother saw many beautiful clothes. Two favorite clothes are in different stores, but the price is the same.
The discount activities of these two companies are also different. The first is full 400 yuan minus 100 yuan; The second one is a 15% discount for those with membership cards, and then a 10% discount for the discount price. So mom began to hesitate.
In order to alleviate my mother's worry, I was afraid that my mother would lose money, so I helped my mother to start a small financial consultant.
The first one is 400 yuan less 100 yuan, and the original price of this dress is 960 yuan. I divide 960 by 400 to get 2+ 160, and multiply it by 2+ 100 to get 200, so this dress is 200 yuan cheaper. I am 960 MINUS 200, which is equal to 640. The discount price of this dress is 640 yuan; The second store gives people with membership cards a 15% discount, and then gives them a 10% discount. The clothes in this store are also from 960 yuan, and my mother happens to have the membership card of this store.
So, I multiply 960 by 85% first, which is equal to 8 16 yuan; Then I multiply 8 16 by 90%, and finally it is about 734. The discounted price of this dress is 734 yuan. In this way, I compared 640 and 734, and finally found that the first one was more favorable, so I told my mother what I found. My mother was very happy and bought the first dress.
Finally, we returned home with a full load. Now it seems that there is a lot of knowledge in the discount, but I have also applied what I have learned in mathematics to real life, so that I will soon know which one is cheaper and more favorable.
3. Small "secret" ingredients of "rounding" in supermarkets In daily life, the calculation method of "rounding" is often used by us, so that we have never doubted its fairness.
However, is rounding really fair? The origin of the matter is this. One night, my mother and I went to the supermarket to buy things and lined up to check out.
Inadvertently looked up and saw that the customer in front was obviously 54.44 yuan, but the sister at the cashier only charged him 54.4 yuan. When it was our turn to check out, I saw that the screen on the cashier showed 87.78 yuan, but the cashier sister charged us 87.8 yuan.
On the way home, I kept seeing the picture of checkout in my mind, wondering: the customer in front just bought 54.44 yuan, and the supermarket undercharged him by 4 cents, while we charged 87.78 yuan, but the supermarket overcharged us by 2 cents. Why is this? Going home with these puzzles, I asked my mother, "The supermarket just charged us 87.8 yuan, 2 cents more.
If this is accumulated over the years, will the supermarket lose money in the end, or will we lose money? "Mom said:" Because the branch is a small unit, there is little circulation in the market now, and supermarkets generally use rounding method to collect money. Who do you think will lose after all these years? "I shook my head in confusion.
The next day, I told my father this question: "Dad, yesterday my mother and I went to the supermarket to buy things. When we checked out, the man in front was 54.44 yuan, and the supermarket only charged him 54.4 yuan, which was 4 cents less, while we charged 87.78 yuan, which was 2 cents more. Who lost? " Dad said, "I bought a candy for a penny when I was a child, but now I can't even buy half a candy." I haven't decided who will win or lose after rounding.
Why don't I take you to the supermarket on Sunday to investigate? "So, I followed my father to the supermarket on Sunday.
First of all, I stood at the first checkout counter of the supermarket for 20 minutes, and recorded the checkout amount of 10 customers: 89. 15 yuan, 328 yuan, 13. 12 yuan, 45.76 yuan, 55 yuan, 49.78 yuan,/kloc. For supermarkets, after the first customer buys something, the "rounding" method is used, and the supermarket earns 5 cents, the second one doesn't, the third one loses 2 cents, the fourth one earns 4 cents, the fifth one doesn't, the sixth one earns 2 cents, the seventh one earns 3 cents, the eighth one loses 3 cents and the ninth one loses 1 cent.
According to this calculation, the supermarket made a net profit of 13 points at once. Then, I went to the second cashier and recorded the checkout amounts of these customers, which were: 58. 13 yuan, 26.2 1 yuan, 74.66 yuan, 63.52 yuan, 223.5438+07 yuan, 82.46 yuan,156 yuan.
Similarly, for supermarkets, the first customer lost 3 cents, the second lost 1 cent, the third earned 4 cents, the fourth lost 2 cents, the fifth earned 3 cents, the sixth earned 4 cents, the seventh lost 2 cents, the eighth lost 3 cents, the ninth earned 2 cents and the tenth earned 2 cents. Finally, I went to the third cashier and recorded the checkout amount of 10 customer, which were: 95. 15 yuan, 68.37 yuan, 164.82 yuan, 73.29 yuan, 209.73 yuan, 6 1.55 yuan, 89 yuan.
For supermarkets, the first customer's supermarket earned 5 cents, the second supermarket earned 3 cents, the third supermarket lost 2 cents, the fourth supermarket earned 1 cent, the fifth supermarket lost 3 cents, the sixth supermarket earned 5 cents, the seventh supermarket earned 4 cents, the eighth supermarket lost 1 cent, and the ninth supermarket earned. Through the analysis of these three sets of data, my father said to me: "Four families" have tails of 1, 2, 3 and 4, and "Five families" have tails of 5, 6, 7, 8 and 9. According to the average probability of "four hospitals" and "five entries", the mantissas are 1 and 9 pairs, 2 pairs and 8 pairs respectively.
According to the average daily business hours of supermarkets 14 hours, supermarkets can earn about 4.48 yuan a day, one month 134.4 yuan and one year 16 12.8 yuan. "oh! I understand that supermarkets use the method of "rounding" to calculate money, and the possibility of "four rooms" and "five entrances" is the same, that is to say, it seems fair for customers to keep accounts with the method of "rounding", but for supermarkets, they can earn thousands of dollars invisibly a year, which is purely unprofitable business.
It seems that between supermarkets and customers, the rounding method is obviously biased towards the supermarket side, which is quite unfair to customers. After this little "accounting", I found the little "secret" of the "rounding" method in supermarkets.
Through this incident, I also understand that there are actually many small "secrets" behind some seemingly ordinary practices or phenomena in daily life. Only by listening more, asking more questions, thinking more and investigating by yourself can we understand the mystery.
At the end of the year and the beginning of the year, many large shopping malls are offering discounts.
"Shoppers"-Mom certainly won't miss the opportunity. No, she took me shopping in the New World today.
As soon as we entered the new world, the dazzling array of goods shocked our eyes. But the most eye-catching advertisement slogan is a big sale. My mother took me into a women's clothing counter.
Mom started to choose clothes, and I wandered around. Suddenly, I saw a sign that said "60% off". I asked my mother curiously, "Mom, what does 60% mean?" My mother said to me while picking out clothes, "That's the percentage, 1 is 100, and 60% is 0.6.
Multiply an integer by ￠, and the result will be smaller than that integer. This sign means to get a new price by multiplying the original price without discount.
The new price is lower than the original price, so you have a discount! ""oh! "I am thoughtful. We went on shopping and walked into the "Bella Vera" brand store.
The sign here says "50% off". I don't understand. What does "50% off" mean? I asked my mother, what does' 50% off' mean? ""Del, you should learn to master! 50% off is 50% off the original price ... "Speaking of percentages, I understand! Mom asked me to calculate the current price. I personally made a multiplication formula, and it took me half a day to work it out. My mother smiled and said to me, "Rain is falling, in fact, multiplying by 0.5 is dividing by 2. "
So you can work out the result quickly! "Today, I really benefited a lot. Not only be satisfied materially (buy clothes), but also be improved in knowledge, knowing the percentage and learning the percentage.
5. "Buy one get one free" composition in the supermarket 2065438+ May 2003 65438+Happy Saturday Sunshine These days, we have been learning about discounts and cost performance in mathematics. Today, I will share with you the preferential advertisements in the supermarket! There are many preferential activities in shopping supermarkets, such as "buy one get one free", "discount" and "reduce the price by a certain amount".
There are usually many kinds of "buy one get one free", such as "buy one get one free" when a new product comes on the market (that is, buy two identical products with one share of money), so give an extra box or a fruit bowl. I personally experienced a "buy one get one free" preferential activity! My mother and I went to Jiajiale Shopping Plaza to buy ham sausages, one of which is chicken-flavored "starch ham" 3.
50 yuan, 45g, marked "buy one get one free" next to it. Because of its good price and heavy weight, I was very moved, so I bought a pack, while my mother bought another kind of ham sausage, 4 yuan, 50g. When I got home, I couldn't wait to cut two packs of ham sausage. After tasting one by one, I feel that the "buy one get one free" ham sausage is not very delicious, but the ham sausage that does not do activities is delicious.
I went through it once. I went to the supermarket and bought 105g instant noodles 3 yuan. There is a card in the package that says "buy one get one free", but not every package is 100% "buy one get one free". Merchants take great pains to promote their products! For preferential activities, some people think that it is not cost-effective in terms of taste and quality, while others think that it is not cost-effective in terms of price and weight. Everyone's choice varies from person to person, and the willing person "takes the bait".
6. Composition about discount (300 words) On Sunday, my mother took me to the mall to buy clothes.
There are many people in the shopping center. I saw many discount signs hanging on the counter, some with a 20% discount and some with a 40% discount. My mother asked me, "Do you know what the discount is?"
I thought about it and said, "mom, the discount is certainly cheaper than the original." But I don't quite understand whether it is a 20% discount or a 50% discount. "
Mom held the bag in her hand and said, "If the price of this bag is a whole, 100% is divided into ten parts, and each part can be called 1 discount. The discount of 10% is to remove the discount of 1% when buying things, and only pay the remaining 90% of the money. "
"Oh," I suddenly realized, "Mom, twenty percent is eighty percent, and seventy percent is seventy percent. That must be 50% off, not 20%. "
My mother praised me and said, "Yes, you are so smart."
So I said to my mother, "Let's take advantage of the discount today and buy more clothes."
7. Write an article about discounts in shopping centers in English, and then write it on our website.
Big sale. We sell all our clothes at very good prices. Do you like sweaters? We have green sweaters for 15, and yellow sweaters for 15. Do you need pants? For boys, we have black pants for 10 and shorts for 16. For girls, we have purple skirts for only $20. How much are our jackets? Only thirty dollars. We have black shoes for only $28. Three pairs of socks are 0 dollars. E buy.
8. Who will help me write an article about discounts and concessions in math diary? I'd like to know how to promote sales through discounts.
With the arrival of the new year, major shopping malls have launched so-called profit-making promotions such as buy one get one free and discount returns, in order to attract more customers and get more benefits.
Because mom also wants to buy clothes on holiday discounts. So on the 24th and 25th, my mother and I went to several big shopping malls in Bao 'an and made a big survey of them. It was found that Haiya Department Store bought 200 free cards from 200 yuan, but the free cards can only buy clothes and shoes, and cannot be used in supermarkets. Carrefour buys 200 yuan and gives 200 yuan and 200 yuan free cards. The free card can only be used one at a time in the next shopping, while the 200 yuan free card can only be used as 100 yuan in the next shopping. Free cards and free cards cannot be used at the same time, and free cards and free coupons cannot be used in supermarkets.
However, in the clothing counter of Haiya Department Store, we found that the clothing prices there are mostly 198 yuan, 298 yuan and 398 yuan, many of which are not enough for 200 yuan, that is, not enough for feedback. Businessmen are really good at cheating. Want to get the gift back, one is to buy more clothes, and the other is to buy more expensive clothes. Some clothes cost more than 300 yuan, and they can get almost 400 yuan coupons, but almost only 200 yuan coupons. Even if the price of clothes is 200 yuan, if you buy 200, you get 200 for free, which is equivalent to buying something from 400 yuan with 200 yuan, and 200÷400=0.5, which is only 50% off. Besides, many of them are not enough for 200 yuan and 50% discount. You might as well give it a 50% discount.
I secretly admire: the merchants are really amazing, and they actually came up with this kind of promotion method. Because the price is cheaper, it attracts more customers and naturally earns more. This is the so-called small profits but quick turnover.
It turns out that shopping also contains many math problems. As long as we find out and think hard, these problems can actually be solved with the mathematical knowledge of "discount and percentage" we have learned. Mathematics is really everywhere in life!
Here I want to tell my dear customers and friends: Before you buy something, you must think twice before you shop around, in order to save the most money and buy the most satisfactory goods; If it is not a product you like very much, don't buy it, or you will fall into the "promotion chain trap" of the merchants.
I won. I kept saving money for shopping and spent more money.
Through the investigation of discount promotion, I understand: "In today's society, rational consumption should become the fashion theme of customers."
9. Feel that time will never fade, turn over the yellowed pages. Now we can only look for those unforgettable "silk threads" in the yellowed pages.
I sat down and stood up again, and my eyes involuntarily evoked a series of memories in each room. In the light of the bedroom, my illiterate grandmother often accompanied me to write and draw, and pulled my bangs behind my ears. Sometimes my grandmother asks me to read some texts to her. She always looks at me happily and smiles. How can I forget the smiling face under the light? In the living room, the singing of ancient paintings and operas continues. Grandma used to hold me on the sofa in front of the TV. The picture is constantly changing, and the tone is constantly changing. My grandmother patted me on the shoulder and gradually I fell asleep.
I can still feel grandma's temperature, but where can I find a hug as my harbor? Grandma's red box is magical and wonderful. When I came home with my schoolbag on my back, I never played in the living room, but ran to the small room and stared blankly at the red box.
Grandma stood on tiptoe and walked to the red box of the TV. She put her hand in, took out one or two sweets and said, "Little greedy cat, eat quickly!" " "Pat me on the shoulder again and walked away. Grandma's candy is delicious, which makes me memorable.
At that time, I thought grandma's red box could be turned into delicious candy, so I often reached out my little hand and asked grandma for candy. Grandma will laugh when she sees my desire, and then she will bring me the candy in the red box.
I later learned that those delicious sweets were bought by my uncle, father and aunt to honor my grandmother. How can I forget that red box full of love? The house is still there. What about people? What about people? What about people? Love, a warm word, flooded in and filled my heart.