Diary 1: Today, my mother and I went to the book supermarket to buy books. It happened that the book supermarket was holding a prize-winning book purchase activity.
The activities are arranged as follows:
1. Anyone who buys books in this supermarket from March 1 day to March 10 will be given a lottery ticket.
2. This activity will send out * * * 1000 lottery tickets, which will be drawn by lottery players until they are exhausted.
3. Award establishment: the first prize 10, and the prize value is 300 yuan.
There are 30 second prizes with a prize value of 100 yuan.
50 third prizes, and the prize money is worth 50 yuan.
4. Draw time: March 9:00 1 1.
When my mother saw it, she knew that we had just learned the percentage, so she asked me to use the percentage to express the winning rate of this activity. This question doesn't bother me. I quickly listed the formula and worked out the result: (10+30+50) ÷1000 = 9%. I explained to my mother that the winning rate was to find out the percentage of winners in the lottery. My mother said happily to me: "It's great that you can apply what you have learned!" " "Hearing my mother's praise, my heart is full of sweetness.
It seems that mastering this knowledge can also solve many problems in life!
Diary 2: In order to welcome the 2008 Olympic Games, the Young Pioneers organized a competition called "Let's speak Olympic English". At the summary meeting, the counselor announced the number of full marks in each class: 34 in class five (1), and 2 in class five (2) 1 ... When chatting after class, Tucki of class five (1) proudly said to Liang Xiao of class five (2), "Many people in our class got full marks." Liang Xiao said unconvinced: "There are 30 people in our class and 50 people in your class!" "Two people can't convince anyone, and they all say that their class has good grades. I am in the sixth grade this semester. I learned the application of percentage and remembered it again. So I calculated the percentage of each class. There are 50 students in class five (1), and 34 students get full marks, 34 ÷ 50 = 0.68 = 68%. There are 30 students in Class 5 (2), with full score of 2 1 person, and 2 1 ÷30=0.7=70%. Although there are many full marks (1) in Class Five, the percentage exceeds five (2).
Diary 3: On Sunday, we learned the relevant knowledge of percentage, and we often use percentage for investigation, statistics, analysis and comparison in production, work and life. So it is very important to use percentages, so I study percentages seriously.
When I came home from school, I turned on the TV as usual. "Gee," I can't open it. Just when I was wondering, my father said, "The TV is broken. I'll send someone to repair it. I'll fix it in a minute. " "Knock, knock, knock" Someone knocked at the door. Dad opened the door and saw that it was a TV repairman. After all, the TV was soon repaired. Dad asked, "How much is it?" "I changed a monitor 10 yuan, welded panel 5 yuan, and changed a remote control 15 yuan. We are friends, let's forget it. " Dad said, "Li Lei, calculate how much it costs for me!" " "I quickly picked up a pen and calculated what 80% of 30 yuan is. I worked out 24 yuan. Father asked me how to calculate. I said, "multiply 30 by 80%" and my father said, "How do you know this?" I said, "We just learned the application of percentage." Dad said, "I see. "
Dad asked me again, "Do you know what the percentage is?" I said confidently, "Of course, a number indicating that one number is a percentage of another number is called a percentage, and a percentage is also called a percentage or a percentage. How about it, not bad? " That's right. Do you know how many kinds of percentage application problems there are? I said, "Piece of cake. I don't mind. There are 4 types of application questions in percentage! " The TV repairman said, "When the father and son ask and answer, it seems to be a game. Give me the money quickly. I have work to do. "
Percentage is very important. Look, I used it to solve the math problems in my life today.