During the National Day holiday, I went back to my hometown with my parents. When we arrived at Quyang Expressway Service Area, we had a rest and filled the car with oil, otherwise the car would run out of oil.

It didn't take long for us to refuel and hit the road again. Suddenly, my father asked me, "Look, you are usually good at math. I will test you!" " We just refueled and added 1 liter 7. 52 yuan, we filled 50 liters of oil. how much is it? "I thought about it and said," You should use 7. 52× 50 = 376 yuan. We just spent 376 yuan on gas, didn't we? ""yes, yes, don't be proud. I'm testing you. If 10 liter of engine oil can run 100 kilometers, let's add 50 liters of engine oil. If there is still 60 liters of oil in the tank, it is 400 kilometers from Shijiazhuang to Tangshan. Is that enough? What should I do when I return to Shijiazhuang from my hometown? Is it enough? "Dad said." Oh! There are two problems, but they don't bother me. It should be 50+60 = 1 10l, then110 divided by10 multiplied by 100 equals1kloc-0/00 km, 65400. "OK, absolutely right, you are good at math, very good!"

I thought: fortunately, I am good at math, otherwise I can't type. In fact, there are more problems and mysteries in mathematics. As long as we work hard to explore and learn together, we will certainly succeed!