Original title: Wuhan Iron and Steel No. 3 middle school students use a function to answer 'double 11', and a limerick reminds' just buy it happily '
On November 10, the non staff members of double 11 and this liberal arts student did not deserve double 11 & hellip& hellip; Double 11, because the shopping discount rules are too complex, the discount has become a complex mathematical calculation problem, and netizens have ridiculed 'it's the annual day of kneeling to admit their mistakes to the math teacher'. Recently, Wang Xiaoning, a math teacher in senior one of No. 3 middle school of WISCO, simply assigned an assignment - "double ten one shopping suggestions for Mom", requiring the students of the two classes to find the most favorable universal formula for double ten one by using functional model and mathematical modeling.
Function encounters double 11 in order to let students have something to say
"Mathematics for ordinary people is not just buying vegetables, but also closely related to our lives." Math teacher Wang Xiaoning said that the arrangement of this research-based learning practice assignment, on the one hand, stems from the 2019 college entrance examination papers, a large number of test questions are drawn from real life. For example, science question 4 takes the famous' broken arm Venus' as an example to explore the beauty of the golden section of the human body, while science question 21 organically combines probability knowledge and sequence knowledge, and the background involves chemistry, biology and medicine, The dry text description of these test questions is long, which requires students to have the ability to observe and solve mathematical problems in specific materials. In addition, the main content of learning in the first semester of senior one is to study the function model, which comes from life. When the function meets double 11, it is a good time for students to experience the application of mathematics in real life, Students should have something to say.
G universal formula
The reporter saw that the assignments submitted by the students are illustrated with pictures and texts, including topic introduction, calculation and analysis, law summary, research and thinking, and the tables, words and calculation process are clear at a glance. Mr. Wang Xiaoning sighed, "the results of the children's research are beyond my imagination. The application of the function model is comprehensive and accurate. It not only has its own simple life thinking, but also has the perfect application of the content learned in the textbook. The tree diagram, list method, image method, piecewise function and abstract formula are used."
"The plan of cutting hands for Mom" is very warm
Through some calculations, Li Haoyang of class 1 (3) of senior high school came up with various universal formulas for discounts, such as full reduction formula and full return formula. He believes that 'full X Yuan back X Yuan voucher' is the biggest 'trap', which will cause people's impulsive consumption. Through a variety of preferential schemes, the direct discount method is more intuitive and cost-effective, 'in the face of exaggerated discounts, Only by looking at problems from a mathematical perspective can we get real benefits. " He sighed. Hu Chenhui of class 7 of grade 1 of senior high school concluded that the best scheme should be selected according to the actual situation. Ye Tianyang of class 3 of grade 1 of senior high school also attached a limerick 'pay attention to small traps and beware of buying scams. Buy what you need rationally and buy what you want calmly. Analyze the cost performance and calculate the discount rate. I wish you a happy shopping day. "
Shopping plan for mom on double 11
The reporter saw that the children were more concerned about their mother's emotions. Li Rui noticed that in addition to the preciseness of science students in his homework, in the analysis and demonstration of his suggestions to his mother, he inserted a small wish, 'my watch is broken, mom, comrade, buy me a new watch.' Jin can from class 1 (3) of senior high school liked this open-ended homework very much. He even drew the commodities demonstrated in the form of hand drawing, and shouted to his mother, "double 11 shopping allowance, super large discount given by Ma Yun's father, remember to use it!" Mom, double eleven, just have fun! Since you bought it for yourself, you might as well buy some for me! "