I want to have a math story about fractions and a short story about fractions. The problem of horse distribution: An old man had 19 horses before his death, and he had three sons. After the old man died, he made a will: give 19 horses to his three sons, with the eldest one accounting for12, the second one accounting for14 and the third one accounting for15. It is forbidden to kill horses. So how do we divide it? The answer to this story is well known: a neighbor lent his 1 horse to three brothers, making them 12 horses, and then distributed them according to the proportions of 12, 14 and 16, and got 632 horses, leaving/kloc. The problem solving here uses "borrowed" knowledge.

There is a math problem about fractions. The denominator is 85. There are 83 simplest true scores, and the total is 3533.

—

Eighty-five

The mathematical story of percentage has several numbers in mathematics: percentage, fraction, decimal and integer. Once, the king of mathematics-percentage held many competitions. The percentage is put behind the tail with a "%",the score is handsome, the waist is tied with a belt, the decimal is beautiful, the body is decorated with gadgets, and the integer is dressed formally, as if attending a major meeting, all of which are for competition.

On the way, they confidently thought that I would not lose. Unconsciously, I arrived at the game site.

When the host loudly announced the start of the game, their mood became tense.

The host asked the score first: "Do you know what percentage is 3/8 of your partner?"

The score thought for a moment and said, "I can't calculate with my mouth, I can only calculate with my pen, so I don't know."

The host asked the decimal again, "Do you know what percentage your partner 12.3 equals?"

Decimal thought for a moment and said to the host, "I won't!" " "

The host finally asked the integer: "Integer, do you know the percentage of your partner's 8 conversion?"

The integer quickly replied, "800%."

Everyone gave a warm applause to the integer. The percentage said, "I have to check it in such a hurry." But he is right, so the integer is a well-deserved champion. "

Students, there are still two things that have not been solved. Can you do it?

How to write math diary about fractions? Urgent! Today, I followed my mother to the market to buy food. Mom said, "I will test you today. Will you buy a dish you like?" My mother gave me 20 yuan to watch my performance. "Make sure the task is completed." I said confidently.

So, I walked and watched, and came to the vegetable area. Seeing the tender and white fresh mushrooms makes my mouth water, because I like mushrooms best. Then buy mushrooms! I asked my aunt who sells vegetables, "Aunt, how much is a catty of mushrooms?" Aunt said: "7 yuan a catty. How much do you want, son? " "Two Jin." I think: If it is two kilograms, it is 274, which is exactly 14 yuan. Aunt should also call me 6 yuan. At this time, the aunt weighed it and said, "Little friend, it doesn't matter if you weigh two ounces or two ounces more." "This ..." How much is two ounces? How much should I give my aunt? While I was thinking, my mother came over. I'm a little embarrassed to see my mother, because I just boasted and now I can't figure it out. My mother told me, "Two Jin is 14 yuan, and two is 1 yuan.40" "Well, a * * * is 15 yuan 40 points." I blurted it out. I gave my aunt who sells vegetables 20 yuan, and my aunt gave me 4.60 yuan. I calculated again, just right, no more, no less.

Through this test, I feel that there are many mysteries of mathematics hidden in our lives, and the ability to learn mathematics is really important. And don't be proud. You should study hard and master more math skills in order to apply what you have learned and solve the problems around you.

How to write math diary about fractions? It's urgent The new semester of 1 has begun. Of course, scores are indispensable around us. Scores are very important to us. As long as you learn the methods taught by teachers, the application problems of fractions can be easily solved. You see, for example, a catty of apples and 2.5 yuan, the price of pears is 2/3 of it, and pears are needed. This problem is very simple, as long as we learn the music score, we can easily solve this problem.

How many words? I'll make it up if it's not enough. . . = =

On the Mathematical Problem of 20 = 15÷(24) of 5 = 32 with the score of 5÷8 = 8.

That is, the numerator and denominator are enlarged or reduced several times at the same time, and the fractional value remains unchanged.

Math diary of Fractions I. A Brief History of Fraction Development

As early as the early stage of cultural development, human beings used scores for measuring and averaging scores. In the earliest ancient documents of various nationalities, there are records about scores; There are also different scoring systems among ethnic groups.

Egyptian: Only the molecule is 1. They made up a table to convert the molecule not 1 into the sum of the molecule 1. For example:

22 1 = 1 14 + 142 2 15 = 1 10 + 130 2 13 = 18 + 152 + 1 104

In Babylon, because they created a hexadecimal counting system, they used fractions with denominators of 60, 602, 603, etc. The Babylonians also compiled a table showing the fraction of the molecule 1, for example,154 =160+6602+40603.

Greeks: Having studied the fractional algorithm in Egypt and the hexadecimal algorithm in Babylon, it is difficult to add, subtract, multiply and divide, and the numerical calculation is not well developed.

In ancient China, the divisor was placed under the dividend, and the quotient of division was placed above the dividend, such as:

23÷7 preparation algorithm Remember:, after the remainder of integer 3 is 2, change it to:, in.

The middle 2 is the numerator, and the back 7 is the denominator. The score reads "three and two-sevenths".

According to the available data, China's ancient mathematical work "Nine Chapters Arithmetic" (about the first century A.D.) has a complete algorithm of four fractions, which is also the earliest in the world.

"Nine Chapters Arithmetic" calls fractional addition "division", and the rule is "the mother multiplication is true, the mother multiplication is the method, and the fact is like the first method", that is, Ba+DC = BC+ADAC. The "real" here is the divisor, that is, the numerator, and the "method" is the divisor, that is, the denominator; "The same method is one" is to divide the dividend into several parts according to the divisor and take one. If you add up the scores of the same denominator, there is a law of "the same mother and the same clan", that is, ba+ca = b+ca.

"Nine Chapters of Arithmetic" calls fractional subtraction "subtraction", and the rule is "mother multiplication, with more subtraction, the remainder is real, the mother multiplication is the method, and the real one is the method". Namely: Ba -DC = BC-adak.

"Nine Chapters Arithmetic" refers to fractional multiplication as "multiplication", and the rule is "mother multiplication is the method, child multiplication is the reality, and it is the method and one". That is: ba× DC = bdac.

"Nine Chapters Arithmetic" calls fractional division "division by division", and the rule is that "the denominator of the method is multiplied by real (for real), and the denominator of the real is multiplied by real (for law), and one is the law". That is, Batong DC = BC.

These rules are almost exactly the same as those we use now.

The subtraction rule in "Nine Chapters Arithmetic" is "you can have half, you can add the denominator and the sub-number, so you can reduce less and more, so you can get the same number", which means that when the numerator and denominator are even numbers, you should divide by 2; If it is not an even number, then subtract a smaller number from a larger number by tossing and turning, and finally get a remainder equal to the subtraction, which is the greatest common divisor. This method of tossing and turning to find the greatest common divisor is consistent with Euclid's tossing and turning division in theory.

The mathematical calculations in India are written in contrast. In the middle of the seventh century, Indian mathematician Ramogupu

2

In Ta's works, two-seventh of the scores are recorded as: 7 (only less than the current score), and the score is three.

three

2

Two-sevenths notation: 7. Like China's computational notation system, the rules of addition, subtraction, multiplication and division of fractions are the same as China's calculation algorithm.

The Arabs accepted India's fractional notation, but added a horizontal line between the numerator and denominator, and wrote an integer part with a fraction in front of the fraction, for example, three and two sevenths as 3 27.

Arabic fraction algorithm/kloc-was introduced to Italy in the early 3rd century, and15th century became popular in European countries. Now it has been used all over the world.

Two math problems about fractions 1 Xiaoming has 12 stamps, Xiao Qiang has 13 stamps, and Xiaoming has Xiao Qiang stamps ().

Warehouse A has half a ton of goods, warehouse B has a quarter of a ton of goods, and warehouse A has () tons more than warehouse B.

Hehe ~ These questions are original ~ Are they quite simple ~

A Math Problem about Fraction 2/9

7/2

1 1/8