I just finished my homework this evening. At this moment, the doorbell rang, and I was very happy, because I knew it was my mother who had not spoken to me for a long time.
After the doorbell rang for five seconds, I quickly ran out of my desk to open the door. As soon as my mother entered the room, she said to me, "Hey, I brought back 1 box of Japanese chocolate!" I immediately cheered: "Yes, it's very kind of mom. Come, give it to me! " "Mom said," mom is not good. I can't just give you chocolate. You must answer my question. "After hearing this, I thought to myself: I am not afraid if you want to test me again!
Mom has a problem: I think it's a matter of reasoning this time. Xiaoming said to Xiaodong yesterday: "Yesterday, there were 10 students in our family. My mother took out a bag of sweets, which contained 54 sweets, and distributed them to small guests, but the number of each person was different. The most frequent one is 10. " Hearing this, Xiaodong immediately said, "You are lying! You lie! " I asked you why Xiaodong said Xiaoming lied. At this moment, I had a brainwave and thought that I had learned "simple reasoning" before. This question is different. I began to calculate: the most one got 10, so there can't be duplicate numbers. Let's assume that the first one gets 65,438+0 candy, the second one gets 2 candy ... and the tenth one gets 10 candy. Xiao Ming is lying, because he said that the bag of candy has 54 pieces, but actually one person wants 55 pieces, so Xiao Ming is lying.
I told my mother what I thought just now. My mother said I was smart, so she gave me this favorite Japanese chocolate. I think mathematics is really everywhere. Even I have to use math to get these chocolates. I got it, which is the crystallization of my efforts, hee hee!
Second, the fourth grade learned the decimal point in the next semester. I also know that when measuring and calculating, it is often impossible to get accurate integer results, so it is often expressed by decimal points.
The other night, I had a dream about decimal point. In a vast forest, the horn sounded suddenly. It turns out that the animal sports meeting officially opened today! There are several events in the sports meeting. Among them, the most striking events are running, swimming and high jump. After fierce competition, the final result has been "released". The result of the running competition is that the pony runs 406.38+0 meters in one minute; The lamb ran 376.28 meters in one minute; The snail ran 129.726 meters in one minute. As a result of the swimming competition, Xiaoyu swam197.63m in one minute; The tortoise swam 184.52 meters in one minute; Tadpoles swim for one minute 152+0 meters. The result of the high jump is that the kangaroo jumped 2.35 meters; The rabbit jumped 1.89 meters; The frog jumped 1.642 meters.
When preparing to announce the result of the game, the fox said to the cow referee; "Cow referee, you see, this decimal point is as big as sesame. Simply put, don't use decimal points. " As she spoke, she erased the decimal point. As a result, the scores of each item have changed. The worst became the best. For example, the pony's running performance has become 4063 1 meter; The running performance of the lamb became 37628 meters; The snail has become 129726 meters. When everyone heard the result, they couldn't help asking: How did snails become running champions? Isn't he usually slow?
When I got up the next morning, I understood that if the decimal point is wrong, it will cause great mistakes.
Tonight, my father mysteriously said to me, "Silver, I can do magic.". Do you believe it? " I can't wait to ask; "What? Do you know how to operate it? What massage is it? " "The magic is this: when you open a book, I can use magic to tell which side is an even page and which side is an odd page." Dad said proudly. Well, I don't believe it. I asked my father to demonstrate the massage on the spot.
I picked up a book and flipped through it quickly. When my father called "stop", I stopped turning the pages. Dad said with a slight air; "There are even pages on the left and odd pages on the right. I calculated, hey, awesome! Dad guessed right. Not convinced, I tried again and the result was still the same. I asked my father inexplicably, "Dad, how did you guess right?" Do you really have magic? "Dad answered me with a smile;" No, I didn't do it. According to the rule that there are even pages on the left and odd pages on the right of the book, I guessed right.
Today, I feel very happy because I have learned another math rule. Math is really interesting!