Take an incident that happened to me two years ago. That day, I got up early, and my mother asked me to help her go downstairs and buy some breakfast. Then I went downstairs with five dollars. Go downstairs, buy breakfast, pay the money. The boss said, "These come to * * * two dollars and fifty cents. I'll give you two dollars and fifty cents. " Then he gave me the money. As soon as I saw it, I quickly said, "No, no! If you give me less than one yuan, you should give me three yuan and fifty cents! " After hearing this, the boss was stupid, hesitated for a while and said to me, "Little friend, you have miscalculated, that is, the 2.50 yuan you are looking for!" " "As soon as I heard this, I was in a hurry to defend myself:" Uncle, you have miscalculated, obviously it is three yuan and fifty cents! "The proprietress on the side saw it and shouted at me in an angry dialect:" Look at this child, he is not young, how can he not even know the most basic arithmetic! " Everyone who ate there laughed "ha ha ha". I looked at it and ran home sadly, telling my parents all the ins and outs of the matter. Mom and dad listened, and they also laughed and leaned forward and backward. I said angrily, "Even you laugh at me!" Dad quickly explained, "It's not that we love to laugh at you, but that you didn't understand and think about Jiao Yuan's score in mathematics. Then I'll ask you what $2.50 is. "
"A dollar."
"How much are those two twenties?"
"Four dollars, of course!"
Finally, I finally understood that my father's explanation was not serious. Since then, I have never made the same mistake again.
I will never forget this joke. It taught me a lesson, which will be imprinted on my mind forever.
Students, you must study math seriously. Mathematics is not that simple. After learning, you must remember: learn mathematics in your life and use it in your life.