I recently read a book about mathematics: The King of Mathematics. As soon as I got the book, the lovely cover attracted me deeply. I finished reading this book with a happy mood. Among the Kings of Mathematics, the most impressive one is Adventures in an Embarrassed Country, which mainly tells that Xiao Ming is a careless king. When he was doing math problems, he made so many jokes because of carelessness that the teacher made a fuss. Xiao Ming wrote on the answer sheet: an apple weighs 200 kilograms, a stamp area is 1 (square meter), a bed is 2 (decimeter), a train is per hour 150 (meter), and the classroom is 8 (meter) ... It seems that Xiao Ming is really careless. On this day, Xiao Ming suddenly saw that his desk was only the size of a matchstick. Xiao Ming felt very strange and asked the driver. The driver said, didn't you write it? I'm driving at the speed you wrote. "Yes, yes, it's all your carelessness, otherwise my height wouldn't be so short ..." The villain also said indignantly. Finally, the train arrived and Xiao Ming couldn't wait to get out of the carriage. "ouch!" An apple weighing 200 kilograms hit Xiaoming hard on the head. Xiao Ming was about to get angry, but then he thought, isn't this his fault? Ah ... Next, he met his small classroom and oversized stamps one by one ... Xiaoming secretly vowed that he must get rid of the bad habit of carelessness in the future. I thought it was no big deal to be careless, but I will pay attention next time anyway. But after reading Xiao Ming's story, I feel that carelessness is really harmful and the consequences are terrible. If the rocket designer is a little careless, the rocket will not go to heaven. If the satellite data has a little error, it will not be able to orbit the earth normally; If the doctor leaves the surgical instruments in the patient's body, it will bring pain to the patient and do harm to the body ... In order to study better, the acquired knowledge will become useful talents in the future, and no mistakes will be made. Everyone should overcome carelessness and get rid of the bad habit of carelessness. Whether studying or doing things, we should be serious, serious, careful and careful. Let's all study carefully.