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Mathematical problems or mathematical papers about "lucky money"
1. Math problems clearly intend to spend lucky money, with learning accounting for 85%, entertainment accounting for 10% and others accounting for 5%. The expenditure on study is more than that on entertainment 1500 yuan. Ask him how much lucky money he has. Method 1: Method of setting the unknown: (Equation method) There is a lucky money of X yuan. X × (85%-10%) =1500 0.75x =1500x = 2000, so he has 2000 lucky money. Method 2: Inverse calculation method: (mathematical method) 1500/(85%-65438).

During the New Year in China, it is a tradition in our country for elders to give lucky money to younger generations. The custom of lucky money has a long history. It represents a good blessing from the elders to the younger generation. It is an amulet given by elders to their children, wishing them good health and good luck in the new year. With the development of social economy, the red envelopes under everyone's pillows are getting bigger and bigger. So how to treat and use the lucky money? I conducted a cooperative investigation with Zhu Lingyi. The following is our investigation report.

1. survey purpose: to understand the situation of primary and secondary school students getting lucky money, make an objective evaluation and put forward pertinent suggestions.

2. Investigation time: 201February 14 ~ 16 (from the first day to the third day).

Three. Investigation location: 1. Home page 2. School 3. Community.

Four. Survey object: 20 primary and secondary school students.

Verb (abbreviation of verb) survey method: 1. Telephone interview II. Inquire online.

6. Investigation question: 1. How much lucky money did you get this year? What about last year?

2. What is the source of your lucky money? Please state the number of parents, relatives, elders, etc.

How are you going to spend your lucky money? Please tell me how much money you plan to spend on books, donations, games and so on.

How satisfied are you with this year's lucky money (expressed in percentage)?

5. What is the actual consumption of your lucky money?

7. Investigation process: I conducted a division of labor investigation, and each person investigated ten people. Mainly in the form of telephone interviews, the respondents are mainly classmates, friends and relatives. I also took the form of online survey. After my investigation, I will put them together and make a table. In the process of investigation, we both encountered some difficulties, such as some students have not used up their lucky money, and some students are unwilling to disclose their lucky money, but these difficulties have been overcome by us one by one.

8. Survey results: (1) In 2065438+00, the lowest lucky money in this survey was 400 yuan, and the highest was 2600 yuan, with an average of 1066.5438+0 1 yuan; In 2006, the lowest 400 yuan was 2800 yuan, with an average of 1088.89 yuan.

(2) In 2065438+00, the average lucky money for middle school students was 882.78 yuan, and in 2009 it was 930.56 yuan. In 20 10, the average lucky money for primary school students was 1650 yuan, and in 2009 it was 1425 yuan.

(3) The lucky money of primary and middle school students mainly comes from relatives, but less from parents, and the annual amount is relatively fixed. There is little change from the elders (grandparents), but there are still some fluctuations every year.

(4) The satisfaction degree of middle school students in 2065438+00 was 77.72%, and that in 2009 was 76.94%; Primary school students' satisfaction with 20 10 is 90%, and in 2009 it was 80%. 20 10 Everyone's satisfaction is higher than that in 2009.

(5) The lucky money of primary school students is obviously higher than that of middle school students, because when middle school students grow up, their parents and relatives give less than before, and they are embarrassed to ask for so much lucky money.

(6) Most of the primary school students' lucky money is saved to pay tuition, while middle school students' lucky money is used to buy books and play, and some of them are saved to buy things they like.

(7) Only a few students have no balance in their lucky money, and most other students have 80% balance.

(8) 50% of the students expressed their willingness to donate some money, 30% said they had not considered it, and the other 20% insisted on not donating.

Nine. Findings:

1. Everyone's lucky money is increasing day by day, which is basically consistent with their original family background. This of course reflects the continuous prosperity and development of social economy, and has achieved fruitful results in building a well-off society in an all-round way. However, there have also been a series of problems, which have contributed to the trend of comparison. The gap between lucky money is too great, and some students have also developed the bad habit of wasting.

2. The lucky money mainly comes from relatives, which shows that the tradition of visiting relatives and friends to pay New Year greetings in China is still quite popular, which deserves our happiness, but it not only increases the burden on relatives, but also increases the burden on our parents. Relatives give us lucky money, and parents give us cousins. If there are many relatives, it is also a big expense.

Everyone is very satisfied with their lucky money, and of course they are very pleased to get it. But the more lucky money, the higher the satisfaction. Explain that everyone is not satisfied with the affection and touch brought by the lucky money, but can do what they like with the lucky money.

With the growth of age, people get less and less lucky money, which shows that the elders have seen our growth. Congratulations! Everyone should correctly understand and treat this problem, instead of being sad about the decrease of their lucky money.

Everyone's lucky money is used scientifically, and there is basically no waste, which shows that everyone has a good habit of thrift. Moreover, we have become more active in the use of lucky money, which shows that we have the ability to control our property. I hope everyone will make persistent efforts.

We think it is meaningful to donate some lucky money, but some students are unwilling to help those who are in trouble. I hope these students can improve their ideological awareness, give roses and leave lingering fragrance in their hands!

X. Suggestions: ① Lucky money occupies an important position in China tradition, only once a year, and must be given. However, parents should consider the basic situation of the family, give the lucky money in moderation, and don't encourage comparison and waste.

We can basically use the lucky money ourselves, and our parents should not let us hand in all the lucky money. This situation is not uncommon in our survey. If parents are really uneasy, we can give a small part of the lucky money to ourselves to cultivate our financial management ability.

Everyone should regard the lucky money as the embodiment of family affection, no matter how much it is, it is a gift. Don't care too much about the amount of lucky money, treat and use it correctly.

(4) Establish your own wish set and write down the wishes you want to complete but can't. When using lucky money, choose meaningful and realizable wishes from the wish set to satisfy your old year wishes.

⑤ Set up your own account, record your own money data, and make better use of our lucky money.