I did some "economic problems" in the cram school a few days ago, which should not be underestimated in real life. When I first started writing questions, I was familiar with them. The voice came-"Kid, is economic problem your specialty?" Warm up before you do the problem! "
I nodded, eagerly waiting for the "warm-up fuss".
"Listen up! A store sells two clothes at the same time, and the price is 60 yuan. One of them made 20% and the other lost 20%. As far as these two clothes are concerned, is the store profitable or losing money? "
When I first heard the question, I was glad. Because I was very skilled in this type of application problem, I answered fearlessly: "In real life, making money and losing money in business only need to compare the relationship between total cost and total income." The total income is 60×2= 120 (yuan), the clothing cost with 20% profit is 60÷( 1+20%)=50 (yuan), and the clothing cost with 20% loss is 60 ÷ (1-20%).
"It seems that this little problem can't beat you!" The math girl exclaimed, "Then it will be even harder for me!"
I said confidently, "Bring it on!"
"Please listen to the question: A store sells a commodity, and its profit rate has increased by 8% because the purchase price has decreased by 6.4%. What is the profit margin of the initial distribution of this commodity? "
At first glance, I'm a little unsure about this problem, but after careful consideration, I found a way to break through this problem-I can set numbers and equations! I replied, "Hee hee, my question didn't stop me from moving forward! Assuming that the original purchase price of the commodity is 1000 yuan and the original profit rate is a, at the same selling price, the equation is1000× (1+a) =1000× (1-604% )× (. After calculation, the solution is A = 65438.
"wow! It seems that you have understood the wonderful way to do math problems! Yes, it is careful, persistent and bold innovation! " The math girl has a little impression on me.
I nodded and said, "Yes, as long as you study hard and work hard, all problems will be solved!" " "
The math girl waved and said with a smile, "I wish you a better swim in the ocean of math and feel the fun and charm of math!" " Bye. See you next time! "
I looked at the math problem in front of me, as if I had a dream, a wonderful dream, which made me know more about math, love it more and appreciate it more.