The cool monkey heard that there was a thrilling drifting entertainment in the playground, so the cool monkey who liked exciting games signed up for it. The three of them boarded the yacht, and the enthusiastic waiter reminded them: "Your yacht has been fueled enough for 6 minutes. Now you can swim 8 meters per minute downstream. If you swim upstream, you can only swim 5 meters per minute. When you play, don't.

The three brothers and sisters were driving a yacht, enjoying the excitement brought by drifting and the scenery along the coast. After a while, the careful sweet sand asked, "How long has it been since we set out? It's time to return!" Shuai Shuai Pig: "It's only 23 minutes. It's not too late for us to drift down for a few more minutes!" "

Tian Tiansha said firmly, "No! We have to do the math, or we won't have enough gasoline when we return, and we will be washed off the cliff by the current! " Shuai Shuai Pig: "Let me calculate, the downstream speed is 8× 23 = 184m, and the upstream speed is 5m per minute when returning, and it is 184÷5=36. Eight minutes, and it takes 23+36 before and after. 8=59。 8 minutes. " At this point, Shuai Shuai Pig was scared into a cold sweat and cried, "Cool monkey, come back soon, it's too late!" On the way back, the cool monkey said, "Today, thanks to Sweet Sand's reminder, otherwise we would be buried on the cliff!" " Math Fairy Tale 2

The forest in autumn presents a scene of bumper harvest, but Sheriff Carl of the Forest Public Security Bureau is not happy, because this period is also the season when theft often happens. No, there's another resident who reported the case to the report office of the Public Security Bureau-Aunt Monkey. Sheriff Carl made a cup of tea for Aunt Monkey and said, "Aunt Monkey, what happened to your family?" Aunt monkey: "I went out for four days this week, but when I got home, I found that all the peaches on the peach trees in my yard had been stolen. Sheriff Carl, you must help me find this hateful thief!" "

Sheriff Carl followed Aunt Monkey to the peach tree. After careful investigation, Sheriff Carl said, "Aunt Monkey, don't worry about waiting at home. I'll ask the thief to return your peach at once!"

as soon as Carl returned to the sheriff's office, he immediately asked the black bear to bring the orangutan. The orangutan was taken to the police station and argued, "I didn't steal peaches. What proof do you have?" Carl said with a smile, "You have said the evidence yourself. We didn't ask you if you stole peaches, but you said you didn't steal peaches. Let's take a look at the photos I took at the scene. There are two-legged footprints on the ground, and you are an expert at walking upright, and the footprints are the same size as your feet." Carl said sternly, "Speak quickly! How many peaches did you steal? " The orangutan bowed his head and confessed: "I stole the peaches, and I forgot how many peaches I stole." I only remember stealing more than half of the peaches on the tree on the first day, stealing more than half of the peaches on the tree on the second day, eating more than half of the peaches on the tree on the third day, and stealing the last peach on the tree on the fourth day. "

Carl thought for a moment and said, "You get something for nothing. Now you are fined to buy 22 peaches and return them to Aunt Monkey, and you will be detained for one week!" The black bear standing on the side asked, "Carl, how do you know there are 22 peaches?" Karl said: "By backward method, there are (1+1) × 2 = 4 after eating the next day, and (4+1) × 2 = 1 after eating the first day, so there are (1+1) × 2 = 22 peaches in * *." Math fairy tale 3

"Let's sell radishes, let's sell radishes." The little rabbit was very excited when he sold radishes for the first time and shouted loudly in the market.

A fox passed the food stall of Little Rabbit and asked, "This radish is quite fresh. How much is it?"

When Bunny saw that there was business to patronize, she quickly came forward and said with a smile on her face, "4 yuan has a basket of big radishes and 1 yuan has four baskets of small radishes."

The fox looked at the side, and the rabbit was the only one selling radishes. With a blink of an eye, he said, "So it's five baskets in 5 yuan, isn't it?"

"Yes, yes!" Little rabbit answered without thinking.

"Well, I'll take three baskets of radishes, two baskets of radishes and a ***5 yuan."

Little Nutbrown hare thought: 5 yuan has five baskets, so radish will become a basket in 1 yuan. Earned more. It is said that the fox is cunning and can calculate. I think this uncle fox is also quite generous.

So, the rabbit happily received the money, and the fox quietly carried the radish away.

When she got home, Little Rabbit told her mother about selling radishes today, thinking that her mother would praise her, but her mother said, "Silly boy, you were cheated by the cunning fox."

Little Nutbrown hare didn't understand what was going on. Mother Rabbit explained, "The original big radish was one basket in 4 yuan, and the small radish was four baskets in 1 yuan. Each basket of small radish was also 2.5 yuan. Although you sold the small radish, you lost the big radish's money. The fox bought three baskets of radishes and two baskets of radishes. The money you should recover is: 4X2+2.5X3=87.5 (yuan), but you only recovered 5 yuan, which is 87.5-5=37.5 (yuan) less, don't you think? "

Thanks to so much, Little Rabbit blushed, clenched his fist, and his eyes seemed to burst into flames. He hated that sly fox.

Mother Rabbit shook her head and said, "There are many temptations outside, and if something goes wrong, we should look for our own reasons."

After listening to her mother's words, Little Rabbit suddenly realized and silently lowered her head, blaming herself for not studying math well at ordinary times, so she should study hard in the future and never be fooled by others again. Math Fairy Tale 4

One day, the sparrow saw Uncle Woodpecker shaking his head and sighing with his finished box in the Woods.

The sparrow quickly landed beside Uncle Woodpecker and asked, "Uncle Woodpecker, what's the matter with you?"

Uncle Woodpecker frowned and said, "I want to make a cuboid box with a volume of .48 cubic meters. But when it was finished, I found that the box was too small to use. I measured it. Its length was .8 meters, its width was .5 meters, and its height was .6 meters, which was only half the size of the box I originally wanted to make. I've been thinking about it. I don't know how long the box to be made should be. Little sparrow, can you help me calculate it? Hearing this, the sparrow quickly said, "No problem. Why don't you double the length, width and height of that small box?"

Uncle Woodpecker asked, "Can this be wrong?"

The sparrow said confidently, "Do you still have to ask? If we double the length, width and height, wouldn't the volume be doubled? Just do it. "

The next day, the little sparrow went to Uncle Woodpecker again. He asked, "How's it going? Is the box ready?"

Uncle Woodpecker said, "No, that box is too big!" "

Hearing this, the little sparrow blushed and thought, What's wrong? Let's ask teacher myna for advice.

after listening to what happened, teacher myna smiled and said to the sparrow, "To make a cuboid box with twice the original volume, you can't double the length, width and height, just use the length× 2 or the width× 2 or the height× 2, for example, (.8× 2 )× .5× .6 = .48 (cubic meter). If the length, width and height are doubled, (.8× 2 )× (.5× 2 )× (.6× 2) = 1.92 (cubic meter), the volume will be expanded by 1.92 ÷ .24 = 8 times. "

The sparrow bowed its head shyly. Later, he told Uncle Woodpecker what Teacher Myna had said. This time, Uncle Woodpecker made a box that was neither too big nor too small, just for use. Math Fairy Tale 5

Little Pig Hem didn't solve the little girl's math problem, and ran back to the background without authorization, which made the pig trainer "Fat and Fierce" lose people and money.

"Fat Devil" went backstage with a whip and found Hem. It was a fierce slap to wave the whip and shine at Hem.

"Fat Devil" gasped and asked, "You can't answer such a simple question! I'm so angry! Let me ask you, two integers are divided by one integer, and the remainder is the same. What results can be derived? "

hum and shake a pair of big ears.

"pa!" Another whip. The "Fat Devil" cried, "The difference between these two integers will definitely be divisible by it! Let me ask you, what is 3 MINUS 262? " Little pig hummed 38 times in a row.

"How much is 3 minus 25?" Xiaohua You Zhu hummed 95 times in a row.

"What two numbers can 38 and 95 be expressed as multiplication?" Xiaohua pig is very skilled in four operations, and it quickly calculates: 38=2×19,95=5×19.

"What is the number that gets the same remainder by dividing 3, 262 and 25?" Little pig hummed 19 times.

"right! This integer is 19! Why don't you do it when you know it? Let me lose 2 yuan money. "

Say that finish, "Fat Evil God" gave Xiaohua Pig another whip.

Xiaohua pig was beaten and bruised all over, and was punished for not eating for two days, which counted 1 multiplication and division problems. Little Pig was lying in his room, crying secretly. It was sad to think that he would make money for the "fat and fierce god" every day, and he would be whipped if he didn't pay attention. It saw a lush forest not far away through the glass window, and thought, how wonderful it would be to live in the forest!

yes, go back to nature! A desire for freedom adds infinite strength to Little Pig Hem. As soon as his eyes rolled, his mind came to him. Hem lying on the ground, kicking around on all fours, and humming in my nose.

Here comes the "Fat Devil". He sees the little pig in pain and thinks that he must have broken it himself. No, Little Pig is a cash cow. Once something goes wrong, who will make money for him!

"Fat Devil" picked up Little Pig and went to the vet. Just out of the room, Hem slammed his head into the nose of "Fat Evil God" and gave him a "sour nose". "Fat and fierce" suddenly had a lot of nose and tears. With a cry of "Ceng", the little pig jumped down from the arms of the "fat and fierce god" and ran down in the direction of the big forest.

"stop! Where are you going! " The "Fat Devil" chased after him. Because he was too fat to run fast, he watched the little pig groan and disappear into the vast forest ... Mathematical Fairy Tale 6

After Shuai Shuai pig ate the elixir, he thought: I wish I could go to Wuzhuangguan to pick a ginseng fruit to quench my thirst. So Shuai Shuai Pig said to the cool monkey, "Apart from the flat peach of the heavenly queen, what fruit is the most precious?" Cool monkey: "Of course, it must be the ginseng fruit of Wuzhuangguan!" " This is right in the heart of Shuai Shuai pig. Busy said: "I heard that ginseng fruit blooms in three thousand years, bears fruit in three thousand years, and matures in three thousand years. It is exactly nine thousand years since our master went to the West to learn Buddhist scriptures. Ginseng fruit should be ripe again. Let's go and ask for a taste." Cool monkey: "Zhenyuan Daxian of Wuzhuangguan is stingy. Although he is sworn brothers with my master, every time he visits Huaguoshan, he only brings the recently planted' ginseng without ginseng fruit."

When Shuai Shuai Pig saw the cool monkey back down, he quickly said, "Maybe the ginseng fruit was not ripe at that time? With your master's relationship with him, it shouldn't be a problem to beg for two fruits! " Cool monkey's heart moved after hearing what Shuai Shuai Pig said. "Action is better than action! Let's go now! " The three of them rode in the clouds and arrived at Wuzhuangguan in the blink of an eye. Zhenyuan Daxian knew that the cool monkey was a disciple of the Monkey King, so he warmly received them and showed them around the ginseng orchard, and said, "The tree on the left is the young ginseng tree I recently cultivated, and the tree on the right is the ginseng fruit tree."

When Shuai Shuai pigs listen to ginseng fruit, their legs get weak. Made up a lie: "My master, an old man, ate ginseng fruit too fast and didn't taste it." He told me that his greatest wish is to know the taste of ginseng fruit. Grandpa Daxian, can you pick a ginseng fruit and let me taste it so that I can tell the master the taste of ginseng fruit? " Zhenyuan Daxian's face is reluctant: "Look at your filial piety. I tested you on my debut question, and I answered the ginseng fruit. If you can't answer it, please return!" Zhenyuan Daxian looked at two fruit trees and said, "Nine ginseng fruits and three ginseng fruits weigh 417 grams, and six ginseng fruits weigh 3 grams compared with three ginseng fruits. How many grams is each ginseng fruit?" Shuai Shuai pig is embarrassed to say, "I don't know the ginseng fruit and the old ginseng. I can't solve it with the equation." Cool monkey: "You can calculate without equations. 9 young ginseng+3 ginseng fruits = 417; Six young ginseng-three ginseng fruits =3. By combining these two formulas, we can know that 15 young ginseng =42, so each young ginseng weighs 28 grams, and each ginseng fruit weighs 55 grams. " Zhenyuan Daxian smiled and said, "It's still cool and clever. Shuai Shuai Pig, it seems that you have to find a clever fruit after eating my ginseng fruit!" Mathematical Fairy Tale 7

Cacaci's experiment of replacing UFO energy with gasoline failed again. Disappointed Cacaci said with chagrin, "If you take any stone on our planet, you can find energy in it!" A Xing, who is interested in astronomy, quickly said, "Meteorite! Let's look for meteorites, maybe we can find the meteorites that your planet flew to the earth, so you can find energy! "

Cacaci said happily after hearing this: "We have built many energy stations in space, and the energy of some energy stations may be attracted to the earth by the gravity of the earth." A xing took Cacaci to the children's science and technology museum that he had visited before, only to find meteorites from various planets in the museum. After careful observation, Cacaci found meteorites from the math planet. Unfortunately, in order to prevent the meteorites from being taken away by children, the science and technology museum set a password on each cabinet:

a b c d

x 9

d c b a

A xing didn't understand it for a long time, so he could only ask. Cacaci said: "The result of A×9 in thousands is a single digit, which means that A can only be 1, and it is impossible to have a single digit D×9=1, so D should be 9, and the product of a hundred times B×9 is also a single digit, and B can only be , leaving only ten digits C, because only 8×9=72, 72+8 = 8 can be found in the product. So ABCD stands for 189 respectively. " A Xing entered the password 189, and sure enough, the cabinet opened a small mouth. Cacaci successfully entered the cabinet from the small mouth of the cabinet and took a small piece from the meteorite. Cacaci finally got the UFO energy with the help of A Xing. In order to thank A Xing, he will invite A Xing to visit his UFO. Math fairy tale 8

put in red: 65-57=8 copies

put in white: 55-39=16 copies

white is 16-8=8 copies more than red

then one copy is 8%8=1 copies

The original * * * has: 1. (57+39)=96

bears were counted out and reported immediately. Fox kept his promise and gave Bear a stack of notebooks for free. Math Fairy Tale 9

In the forest, there lived a rabbit family. The family members were: rabbit father, rabbit mother, rabbit sister and rabbit brother. Their combined age is