Mathematical fairy tale 1: a fox with seven minds and an owl with one mind
One day, an owl met a fox. The fox boasted of his cleverness and wisdom.
The owl asked, Brother, how many brains do you have?
Fox bragged: seven. ?
The owl said, no wonder you are so clever. I only have one idea. ?
Soon, the owl met the fox again, but this time the fox was running for his life. The hunter is chasing the fox, and the hounds want to catch it. The fox ran away quickly and finally got into a hole.
The owl chased the fox and asked, How many brains do you have?
The fox replied:? Six. I just lost one. ?
At the same time, the hunter and the dog are getting closer and closer, and the fox doesn't know what to do.
The owl asked again:? How many minds do you have now, old friend?
? God, I lost my mind and eyes, and now I have nothing. ? Said the fox, trembling.
? Where is the cleverness and wisdom you boast about?
? Do me a favor and save a poor guy who was chased by a dog. ? At this time, the fox can only ask for help.
The owl said, well, although I only have one idea, I want to see if I can save you with this idea. I will lie at the mouth of the cave and play dead. Hunters and dogs will definitely notice me, so take the opportunity to run for your life. ?
Sure enough, the hunter found the owl and asked curiously, what happened to the bird? Is it a dead bird?
Just when the hunter wanted to take the owl away, the fox took the opportunity to escape.
Soon, the owl met the fox again. The owl said, are your seven minds useful in times of danger? Remember, the more you want, the more you lose! You see, although I only have one mind, this mind is very valuable! Unlike you, you have so many brains, but you don't need a serious place. ?
Math Fairy Tale 2: Little White Rabbit Buy Radish
The white rabbit came to Dudu Bear's radish shop to buy 1 kg carrots to visit her grandmother. The little white rabbit looked at many radishes in baskets, picked a basket of radishes, put them on the scales, and pointed to the scales on the scales and said, Ah! You have a good eye! This basket of radishes is exactly 1 kg! ? Say that finish, Dudu Bear handed the radish to the little white rabbit.
After paying all the money, the white rabbit is ready to leave with the radish. The clever monkey standing by pointed to the radish basket and said to it, Brother, don't you even eat the basket when you buy radish to eat at home? The little white rabbit pondered for a moment and suddenly realized: Oh, I am so confused! I just looked at the shape of the basket with radish and forgot the weight of the basket itself. ? He turned and asked Dudu Bear, How heavy is the basket? How many radishes are there in this basket?
Dudu Bear took another identical empty basket, put it on the balance and weighed 280 grams. Later, Dudu Bear put some radishes in it. At this time, the total weight of basket and radish is 1 kg. The white rabbit touched his forehead and said that the basket weighed 280 grams, and the radish weighed 1000280=720 (grams), and 280 grams of radish was missing. ? Dudu Bear continued to put some radishes in the basket. At this time, the total weight of radish and basket is 1280 g. The white rabbit scratched his head and said, Now, the weight of radish is 1280280= 1000 (g). 1 000g = 1 kg, which is exactly1kg of radish! ? After that, the little white rabbit picked up the basket of radishes and walked happily towards her grandmother's house.
Mathematical fairy tales 3
There are 20 monkeys in the forest. They live in harmony. Good food is always shared equally by everyone and never mistreats either side.
Once, 20 monkeys picked 130 wild pears, but it was impossible to calculate how many pears each monkey should get. The monkeys were so busy for a long time that they couldn't eat pears at once. Some of them jumped around, scratching their heads.
The scene of monkeys sharing pears has long been clearly seen by a fox hiding outside. At this time, the fox swaggered towards the monkeys. Monkey, what makes you so anxious? Without waiting for the monkey to answer, the fox went on to say, pears are not equally divided, are they? This matter is easy to handle. Let me help, okay?
? Great! ? Several monkeys agreed without saying anything.
So the fox pretended to count it in detail, then counted the monkeys and said, your 130 pears, give it to 20 monkey brothers, according to the formula? 130? 20? Every monkey brother deserves it?
As the fox said, he wrote a vertical score on the ground. 130? 20 and cross out a 0 after 13, and cross out a 0 after 2, which is easy to forget.
The monkeys looked at it and nodded again and again. One monkey scrambled to say, we each took a pear, and there is 1 pear left? . The fox patted the monkey on the shoulder. Dude is very smart. Now you all come and get six, and then give me the last one to taste. ?
? Wait! ? At this time, a golden monkey jumped in front of the fox and pointed to his vertical score. In the vertical form, both the divisor and the dividend are crossed out with a 0, which means that 10 times is reduced at the same time, so the remainder is reduced by 10 times. In this way, the score you want is not 1, but 10. ?
? It turns out that the fox is not kind enough to help! ? The other monkeys understood at once.