Bajie opened a small grocery store. One day, the little monkey came to make a catty of vinegar for his family. The little macaque came to Uncle Shi's shop and shouted, "Uncle Shi, jealous!" " "
Bajie asked the little macaque how much vinegar he played. The little macaque said, "Not much, just one or two."
Pig was surprised and asked, "What's the use of vinegar?" The little macaque said, "Of course!" Pig asked again, "Is one or two enough?" The little monkey said, "Not enough, let's play one or two more!" " "
Pig asked again, "Two taels is not much?" The little monkey said, "Let's play again." Bajie hit once or twice again. The little monkey said, "Give me one or two, and then give me one or two ..." In this way, the little monkey made twelve ounces of vinegar, which is a catty of vinegar.
After drinking vinegar, the pig said, "* * * A catty of vinegar is eighty cents." The little macaque unhurriedly took out eighty cents and gave it to Uncle Bajie. Pig took the money and said, "No kidding, it's still 4 cents short!" The little macaque asked, "Uncle Shi, how much is a cup of vinegar?" "
Pig Pig said, "Of course, one or two ounces of vinegar is 8 cents and 4 cents, and you should give it away. Charge 8 cents. " The little monkey said, "So, one vinegar or two is 8 cents." "Of course," Pig said. The little macaque added, "Twelve ounces of vinegar is eighty cents!" "
Pig said, "It's accurate." The little monkey said, "I gave you eighty cents." How can you say that you still need 4 cents? " Bajie was speechless, lost another 40 cents, and watched the little macaque go away with vinegar.
The story of 0
In the mysterious kingdom of mathematics, two "secondary numbers", namely "0" of the fat man and "1" of the thin man, often argue endlessly about who is important. Look! Today, these two little enemies meet in a narrow way, and they have launched another war of words.
The thin man "1" spoke first: "Hum! Fat' 0', what's so great about you? Just like 100, what's the use of you two being fat without my thin'1'?"
Fat man "0" is not convinced: "Don't be overbearing in front of me. Think about it. Without me, where are you going to find other numbers 100? "
"hey!" "1" is not to be outdone. "No matter how arrogant you are, you are insignificant. Look! 1+0' is not equal to myself. What's your use? "
"Let's go! The result of'1× 0' is not me, and your'1'is also useless! " "0" is tit for tat.
"You ..." "1"paused and improvised. "Anyway, your' 0' doesn't mean anything!"
"This is your lack of knowledge." "0" said unhurriedly, "You see, in daily life, the temperature is 0 degrees. Is there no temperature? For another example, without my starting point on the ruler, how can there be'1'?"
"No matter how you compare, you can only do the middle number or mantissa, such as 1037, 1307, and you can never lead." 1 "said confidently. Hearing this, "0" said more confidently: "This may be, for example, 0. 1. What can you do without my" 0 "to occupy it?"
Seeing that the fat man "0" and the thin man "1" both blushed, no one would let anyone, and other people watching were very anxious. At this time, "9" had a brainwave and made a gesture of pause: "You two stop arguing. Look at you, which size is bigger than me? " "This ..." The fat man "0" and the thin man "1" were speechless. At this time, "9" said calmly: "1" and "0". In fact, as long as you stand together, aren't you older than me? "1" and "0" looked at each other, and it took a long time to scratch their heads and laugh. " That's right! The power of unity is the most important! ""No.9 "said earnestly.
Fast calculation of small star "5"
In the exhibition center of electronic calculators in Mathematics City, sales staff skillfully operate various electronic calculators and calculate various problems. The audience gave a burst of admiration from time to time, how fast and accurate it was. Many primary school students in the crowd are holding their parents and clamoring to buy electronic calculators. With it, it is great to do math problems!
"no!" Suddenly, a strange dwarf jumped on the counter and shook his hand and said to the pupils, "children shouldn't use such things." They should cultivate their own computing ability and learn simple algorithms from an early age. " With a good algorithm, it is sometimes faster than a calculator. "
Everyone focused on the dwarf, and when they looked carefully, it turned out to be a small "5" nicknamed "Banzi".
"What? Can you calculate faster than my calculator? " The salesman asked strangely. Little "5" said, "Don't believe me, let's try." At some point, the little "5" said to everyone: "You can just quote a number and multiply it by 5. Salesman, please use the electronic calculator to calculate and see who is faster? "
"good!" Everybody shout together. Someone in the audience reported the formula "246×5" first.
1230 "small" 5 "blurted out.
"3 14×5、289×5……"
"1570, 1445 ..." Small "5" reported at one breath.
Before the salesman could finish the operation, the number was told by a small "5"
"good!" Everyone applauded warmly. Little "5" smiled and said, "This is called" plus zero to fold in half ",because 5 is half of 10, and a number is multiplied by 5. Expand this number by 10 times and then fold it in half. For example, 246× 5 = 2460 ÷ 2 = 1230. "
"Let's compare it again." The salesman said unconvinced.
"Well, let's calculate the square of any two-digit number whose last digit is 5." Small "5" said.
"equal to 3025." Small "5" is really fast, and it was reported at once.
At this time, even the salesman admired Xiao "5"' s articulate speech. Small "5" said: "Any last digit is the square of two digits of 5. Just multiply its ten digits by a larger number 1, and then add 25 after the product, and the result is obtained. For example, 752=5625, and 56 is the product of 7 and 8.
"Haha, this is very fast."
"Half, really smart, dare to compare skills with calculators; The method is wonderful, fast and accurate, and it is the big star of Mathematics City. " I don't know who made up some jingles and made everyone laugh!
Tang Priest and his disciples picked peaches.
One day, the Tang Priest told his disciples Wukong, Bajie and Friar Sand to go to Huaguoshan to pick peaches. Before long, the three disciples returned happily after picking peaches. Tang Priest and his disciples asked: How many peaches did each of you pick?
Bajie said with a silly smile, Master, let me test you. Each of us took the same amount of money. There are less than 65,438+000 peaches in my basket. If we count three peaches, there are 1 peach left in the end. Do the math. How many did each of us choose?
Friar Sand said mysteriously, Master, I will test you, too. If there are four peaches in my basket, there is 1 left in the end. Do the math. How many did each of us choose?
Wukong smiled and said, Master, I'll test you, too. If there are five peaches in my basket, there will be 1 in the end. Do the math. How many shall we each choose?
how much is it?