Mathematical Travel Notes Writing Composition

1. Mathematics Diary 400 words

Today at noon, I was doing my summer vacation homework in mathematics. As I was writing and writing, I unfortunately encountered a very difficult question. I thought about it for a long time and couldn’t figure out the reason. This question is like this:

There is a cuboid with two areas on the front and the top. The product of is 209 square centimeters, and the length, width, and height are all prime numbers. Find its volume.

I saw it and thought: This question is really difficult! What is known is only the product of two surface areas, and the volume must also know the length, width, and height, but it does not give any hint at all. How to get this!

Just as I was scratching my head and head anxiously, one of my mother’s colleagues came. He first taught me to use equations to solve problems, but I was not very familiar with the equation method. So, he taught me another method: first list the numbers, and then eliminate them one by one. We first listed many numbers according to the requirements of the topic, such as: 3, 5, 7, 11 and other prime numbers. Then we started to exclude, and then we found that only the two numbers 11 and 19 were left. At this time, I thought: One of these two numbers is the front of the cuboid in the question, with the common edge length on it; the other is the front of the cuboid, with the other number besides the above one

are all prime numbers). So, I started to distinguish which number each of these two numbers was.

Finally, I got the result, which is 374 cubic centimeters. My calculation formula is: 209=11*19 19=2+17 11*2*17=374 (cubic centimeters)

Later, I used the knowledge I learned this semester: decomposition of mass factors to check After answering this question, the result was exactly the same.

After solving this problem, I was happier than anyone else. I also understand a truth: mathematics is full of mysteries, waiting for us to explore. 2. 5 mathematics diaries of 300 words

1. Today’s mathematics class is a practical activity. We are divided into groups of 8 people each.

Then the members of each group worked together to find ways to estimate how many grains of soybeans there are in 1 kilogram? According to the estimation method introduced in the book, it seems not difficult, but to minimize the error, you have to be serious. I originally suggested that the group use cups to measure more accurately.

But the cup cannot be found. Later, this group chose the method of grabbing by hand.

Team member Luo Guangyuan is responsible for arresting them. oops! Luo Guangyuan’s little hands are quite big! One catch is 180 beans, and 30 consecutive catches are enough to catch 1 kilogram of soybeans.

Finally done. 30 180 equals 5400 pills.

In this way, I learned that there are approximately 5,400 soybeans in 1,000. I was inspired by this practical activity. I might as well use these methods to try melon seeds, candies, peanuts, etc.

In fact, mathematics problems are closely related to life. 2. Today, one of the math homework questions is to weigh a pair of shoes.

So, I went to my mother to ask for a "scale". Mom said she didn't have a "scale."

What to do? However, as the saying goes: "Nothing is difficult in this world." I think there must be a way.

So, I used my clever brain and came up with: homemade balance. I cut off the paper of the empty mooncake box piece by piece, took the transparent tape, folded one piece of paper into a right triangle, pasted it and placed it on the countertop.

Another piece of paper is used as the left and right plates of the scale, which is balanced on the top of the triangle. Then find some weighted objects at home to use as weights.

For example: Mom’s newly bought toothpaste, lipstick and other items include 120 grams, 40 grams, 18 grams, and 3 grams. The exciting shoe weighing activity began.

I placed the shoes on the left side of the homemade balance, and the "item weight" on the right side. The weight was placed on both sides to balance it. Then add the weights together and the sum is the weight of my shoes.

Exactly 86 grams. Hard work pays off! I finally finished my math homework.

My mother was full of praise for me when she found out. He also jokingly said to me: "In ancient times, there was a smart Cao Chong who called elephants, and in modern times, there is a smart Honghong who called shoes!" After saying that, everyone burst out laughing.

It turns out that there are "scales" everywhere in life! 3. The annual math competition has begun. The forest was bustling with activity.

Participating in the competition this year are: rabbit, turtle, tiger and lion. The game begins.

Teacher Swan first gave each of these candidates a test paper, and then said to them: "Whoever can calculate correctly and quickly within a certain time will win the Wisdom Cup grand prize." Teacher Swan As soon as the words are finished.

The candidates began to write. Rabbits run fast and do things quickly.

I saw that she was writing like a god, and in a short while she had finished more than half of it. Come, let's take a look at its exam papers.

"Dizzy!!!" Look: 80-70=150, 20÷4=80... How sloppy! I didn't even see the arithmetic symbols clearly. Look at lions and tigers again.

Hey! Why don't we see lions and tigers? All I saw was a lot of manuscripts. Before I left, I took a look and saw that the lions and tigers were very busy! It turns out that every time the lion makes a piece of work, he has to take out the manuscript paper and calculate it.

As the number of manuscripts piled up, the lion's head was covered up. He is really simple-minded and well-developed limbs.

The tiger is even more exaggerated. Every time you finish a question, take out the manuscript and check it once.

No wonder I was sweating profusely. Finally, let’s take a look at the turtle! Turtle is usually slow-tempered, but this time its mind was not slow at all.

Look at how wonderful this question is: 3456-999=3456-1001=2457. The turtle used a simple algorithm to finish the test paper quickly, and he did it correctly and quickly! In the end, the turtle won the Wisdom Award.

4. In the evening, I saw a difficult problem in the Olympic book: There are three times as many apple trees as pear trees in the orchard. Master Wang fertilizes 50 apple trees and 20 pear trees every day for several days. Finally, all the pear trees were fertilized, but there were still 80 apple trees that were not fertilized. I would like to ask: How many apple trees and pear trees are there in the orchard? I wasn't intimidated by the question; the difficult questions piqued my interest.

I think that apple trees are three times as large as pear trees. If both trees are to be fertilized on the same day, Master Wang should fertilize "20*3" apple trees and 20 pear trees every day. Fertilize the tree. In fact, he only fertilized 50 apple trees every day, a difference of 10 trees, and finally a difference of 80 apple trees. From this, we can know that Master Lao Wang has been fertilizing for 8 days.

There are 20 pear trees in one day, which means 160 pear trees in 8 days. Based on the first condition, we can know that there are 480 apple trees. This is to use the idea of ????hypothesis to solve problems, so I think the hypothesis method is actually a good way to solve problems.

5. Time is a thing that "a good horse never looks back". Mathematics is an interesting subject.

It is incredible that these two can now be combined into one. Mathematics is the paradise of numbers, and time is the paradise of moments.

Today, I will introduce to you the mathematics of time. The first thing to introduce is the right-angled moments. The right-angled moments are 3 o'clock and 9 o'clock.

The next step is to introduce the moment of "three needles make two". This moment is 9:30:30, 10:00, 2:00, 7:40:40... Then we will introduce the "original needle does not move" moment.

This moment is 10 hours 5 minutes 10 seconds, 8 hours 6 minutes 9 seconds, 15 hours 25 minutes 1 second, 6 hours 15 minutes 20 seconds... The last moment I will introduce to you is like a magician , it actually transformed three needles into one needle. Isn’t it amazing? This time is exactly 12 o'clock, how about it, it's interesting! Time, you are so amazing! Mathematics, you are amazing. 3. A Mathematics Diary Composition

[A Mathematics Diary Composition]

Length, area, and volume (volume) are all units, and the rates of progression between them are also different. , their unit names are also different. The unit names of length are meters and centimeters, and the ratio between them is 100; the unit names of volume are cubic meters, cubic decimeters and cubic centimeters, and the ratio between the two units is 1000; of course, the volume unit also has a name, but when measuring volume, volume units are generally used. However, when measuring the volume of liquids, the commonly used volume units are liters and milliliters. The ratio between them is also 1000. Volume units and volume units have the following relationship: 1 liter = 1 cubic decimeter, 1 milliliter = 1 cubic centimeter, so there are differences in the ratio between units. It is best to remember them firmly to avoid misremembering the ratio! A 250-word mathematics diary composition for primary school students (/) 4. 2 mathematics diary articles (more than 400 words)

1)

Today, our family went to eat at KFC in Longgang Package for the whole family.

When we got there, people were always crowded. We finally ordered our food and found a seat to sit down. The food came, a big bucket of set meals. There were 12 chicken drumsticks in it. I thought: How to divide them equally? At this time, I remembered the division 12÷3=4. Each of us had four chicken drumsticks. I later ate one drumstick from my mother and two drumsticks from my aunt. My aunt said, "You can't eat this for free. Let me ask you, how much did you eat? You can eat it again." How many portions did I eat? "I thought for a while and replied: "I ate 7/12, and then I ate 5/12 and then I ate it all." Fortunately, I learned about fractions and could answer the question correctly. < /p>

(2)

Today, my mother gave me 10 yuan to buy things in the supermarket. I bought a bunch of firecrackers for 2/10 of the money, four lollipops for 1/10 of the money, and 7 balloons for 2/10 of the money, and finally bought one The comb cost 4/10 of the money, and the comb cost 2/11/12/14/10=9/10. There was only one yuan left and I had to give it back to my mother.

After we got home, my mother ate 1/4 of the lollipop, my father ate 1/4 of the lollipop, and I ate 1/4 of the lollipop, and there was still one left. Gave it to brother Xiaoqiang next door.

(Author: Sean Ling)

(3)

Last week, we learned about fractions. Fractions have numerators, denominators and fraction lines. For example: 1/3, 3 is the denominator, 1 is the numerator, and the horizontal line in the middle is the fraction line.

Fractions are used in many places in life. For example, a book has thirty pages, and each page is 1/30 of a book. Fractions can also be used to add and subtract! For example: one-half plus one-half equals two-half, which is 1. Why is this happening? If a pie is divided into two equal portions, each portion will be 1/2 of the pie. If the two portions are put together, there will be two 1/2 portions, which is exactly one pie. When adding and subtracting fractions, if the denominators are the same, just add the numerators regardless of the denominators. The numerator and denominator of 2/2 are the same, which is 1.

I also learned to compare the sizes of fractions. The teacher taught us the formula: if the numerator is the same, the denominator is bigger. The smaller the molecule, the smaller the fraction.

The teacher also reminded us that when writing fractions, we usually write the fractional line first, which means the average score, then the denominator, and finally the numerator. 5. Who gave me 20 mathematical diaries, with fewer words, no need Too many

Wednesday, February 23rd, was overcast today. After I went to school to register and returned home, I wrapped my book covers and began to calculate my expenses for this semester.

The first is tuition. Tuition fee is 410 yuan, plus 20 yuan for drinking water, ***430 yuan.

Then the fee for the Olympic Mathematics School is 180 yuan, and it is estimated that there is also a transportation fee of 20 yuan, which is 200 yuan. There is also money for exercise books: 2 copies of "Lectures and Lessons" are 21.5 yuan; 1 copy of "English Exercises" is 9.9 yuan; 2 copies of "Examination Papers" are 15.9 yuan; and 3 copies of "Jiangsu Exam Papers" are 21 yuan.

21.5+9.9+15.9+13+21=81.3 (yuan). Study fee: 432081.3=711.3 (yuan).

Living expenses: I will drink about 5 cartons of milk this semester, 5*30=150 (yuan). Each meal costs about 2 to 3 yuan. Calculating it to 2.5 yuan, 2.5*3*30*5=1125 (yuan).

"What else is there?" I bit my pencil and said to myself, "And your school supplies." Hey, my mother is back.

Yes, there are school supplies. School supplies: a pencil case 8 yuan, a pencil case 3 yuan (very cheap, clearance item), six pencils 3 yuan, an eraser 0.5 yuan, two triangle rulers 1 yuan, two mechanical pencils 5 yuan, 8 +3+0.5+1+5=20.5 (yuan).

Total expenditure: 711.3+151125+20.5=2006.8 (yuan). Wow, I didn’t expect that I, who usually don’t spend much money, would actually ask my parents to spend 2,006.8 yuan on me this semester.

It seems that I need to save money! Saturday, September 3, 2005 Weather: cloudy He Jiahong Our new mathematics teacher In a golden September, the new semester began. I was lucky enough to meet a new mathematics teacher-Yang Zheng. When you hear this name, don't think she is a man. In fact, she is a female teacher.

Tall, with big eyes, he looks like a middle school student. The first lesson she taught was: multiplication and division.

When she analyzed math problems, she not only drew pictures, but also quoted real life examples, over and over again, until we completely understood and nodded to her. Teacher Yang taught so well. The first class left me with endless aftertaste.

Saturday, September 17, 2005 Weather: rainy He Jiahong Why do we like to tell small stories in class? Yesterday, Teacher Yang asked us to discuss why some students like to tell small stories in class? I think the reason for this is not unique. I remember one time in a foreign teacher class, a classmate sitting next to me didn’t like English class and couldn’t understand what the American teacher said.

So he secretly came to me to tell small stories. Because I couldn't stand the temptation of his Disney topic, I started "discussing" with him.

Later I was criticized by the teacher. I think: speaking small words in class not only affects my own learning, but also affects the learning of others.

We must get rid of these bad habits. September 25, 2005 Sunday Weather: Rain Ho Chia Hung Weighing Shoes Today, one of the math homework questions is to weigh a pair of shoes.

So, I went to my mother to ask for a "scale". Mom said she didn't have a "scale."

What to do? However, as the saying goes: "Nothing is difficult in this world." I think there must be a way.

So, I used my clever brain and came up with: homemade balance. I cut off the paper of the empty mooncake box piece by piece, took the transparent tape, folded one piece of paper into a right triangle, pasted it and placed it on the countertop.

Another piece of paper is used as the left and right plates of the scale, which is balanced on the top of the triangle. Then find some weighted objects at home to use as weights.

For example: Mom’s newly bought toothpaste, lipstick and other items include 120 grams, 40 grams, 18 grams, and 3 grams. The exciting shoe weighing activity began.

I placed the shoes on the left side of the homemade balance, and the "item weight" on the right side. The weight was placed on both sides to balance it. Then add the weights together and the sum is the weight of my shoes.

Exactly 86 grams. Hard work pays off! I finally finished my math homework.

My mother was full of praise for me when she found out. He also jokingly said to me: "In ancient times, there was a smart Cao Chong who called elephants, and in modern times, there is a smart Honghong who called shoes!" After saying that, everyone burst out laughing.

It turns out that there are "scales" everywhere in life! Thursday, September 29, 2005 Weather: Sunny He Jiahong Happy Mathematics Class In yesterday’s math class, Teacher Yang taught us the section “Going to the Playground”. Because it was about fun projects, the students were very active in asking questions.

I am no exception. After thinking about it, I raised my hand and asked this question: "Is 200 yuan enough for 16 people to play all three projects?" After hearing this, Teacher Yang praised me for asking a very difficult question.

However, under the prompts of Teacher Yang, I also answered the questions for my classmates. I remember a scientist said: "Asking a question is often more difficult than solving a problem."

In this math class, we not only asked many questions, but also solved many problems. We are really amazing. ah! Sunday, October 2, 2005 Weather: Sunny Ho Jiahong I'm awesome Today, we went to "Happy Valley". The adult ticket price of Happy Valley is: 140 yuan; half ticket for children.

When I was waiting in line to buy tickets, my mother asked me to calculate how much it would cost for us to buy tickets. I blurted out: "One *** costs 700 yuan."

My mother asked me in surprise how I calculated so quickly. In fact, this is what I think: a half-ticket for 4 children is equivalent to the fare for 2 adults. Plus 3 adults, it is exactly the fare for 5 adults. 140 for 5 is exactly equal to 700 yuan.

My mother praised me for being great! Thursday, October 13, 2005 Weather: Clear How many times does Shenzhou 6 orbit the Earth every day? After hearing this, I thought: "So how many times can Shenzhou 6 orbit the earth in one day? So I quickly used my brain to calculate: there are 24 hours in a day, and 1 hour is 60 minutes, that is: 24 times 60 is 1440 minutes in a day. .

Then divide 1440 minutes by 90, which equals 16 circles. Also, Shenzhou 6 will explore in space for 5 days, which means that the astronauts will circle the earth 80 times. They are amazing! Thursday, October 20, 2005 Weather: Sunny He Jiahong Counting Soybeans Today’s math class is a practical activity. We are divided into groups of 8 people, and then the members of each group work together to find ways to estimate 1. How many grains of soybeans are there in a kilogram? It seems not difficult according to the estimation method introduced in the book, but you have to be careful to minimize the error.

I originally suggested that this group would use cups to measure it accurately. A little. But the cup couldn’t be found.

Later, the group chose to use their hands.

6. How to write a good fifth-grade composition

1. Improve the ability to understand and express things. Mr. Ye Shengtao, a famous educator in China, pointed out: "Writing anything depends on understanding and experience. What kind of understanding and experience are there?" What kind of things can be written based on experience. On the contrary, if you do not have the ability to express knowledge, you will not be able to write a good composition." Second, take the cognitive structure as the core of composition, including learning knowledge, observation and accumulation, memory storage, and thinking training , enrich imagination, cultivate emotions, and exercise will; from speaking to writing, revise carefully, read more and write more. Third, establish a great composition concept, organically combine listening, speaking, reading, and writing. First, focus on reviewing the topic; second, clarify the purpose of writing, The idea must be new; third, the material selection must be well-founded; fourth, pay attention to article planning skills and arrange the chapter structure; fifth, pay attention to the paragraphing of the article, list subtitles in advance, and write an outline; sixth, pay attention to the writing method of the article and use it according to the text; seventh, Make good use of language and use your thoughts to mobilize language. Learn five methods of constructing ideas: praising people with things, expressing your feelings directly, borrowing things to metaphor, touching scenes to evoke feelings, and expressing ambitions through things. 4. The major goals of composition are divided into first-grade words and second-grade sentences by grade. , third-grade fragments, fourth-grade chapters, fifth-grade comprehensive, sixth-grade improvement. 5. Implementing five trainings According to the principle that understanding is the core of composition, five trainings were carried out in a down-to-earth manner around this core of developing students' psychological mechanisms. : (1) Word training. Learn to master a large number of words. Master the golden key to using words: connect with things you are familiar with; connect with your own life reality; connect with the language and word knowledge you have learned. Use "Ten Yin Shuo" The method combines word learning with speaking training. "Shi Yin Shuo" is: 1. Analyze glyphs; 2. Use teaching aids; 3. Learn words based on pictures; 4. Group words and expand words; 5. Select words to fill in the blanks; 6. Word matching; 7. Adjust word order; 8. Use words that evoke the scene; 9. Word classification; 10. Connect words to form sentences. It enriches the content of speaking training and allows you to accumulate a large number of words that you can speak and use, laying the foundation for writing essays. Solid foundation. (2) Sentence training. As long as it is a sentence, it includes two aspects: one is the person, thing, thing, scene, and the other is the purpose. However, some teachers do not have much knowledge when instructing students to say a sentence. It is best to use pictures and things to carefully teach students how to observe, understand, analyze, and express. Just take out a picture or an object and let the students say and write a sentence. The students do not know why they should say and write a sentence, and how to say and write a sentence. , telling what sentence type and sentence pattern to write, resulting in a single, dull, and inactive tone in the composition. Instead, students can be asked to use pictures, look at objects, have conversations, and practice speaking and writing a sentence with the four elements of time, place, person, and event Complete words, four sentence patterns, nine sentence patterns. Only then will students be able to use different sentence patterns and sentence patterns in their compositions to express different thoughts, feelings, attitudes, and purposes. (3) Paragraph training. Combine the eight types of sentences. Segment type: use the development of things as sequence segments, time sequence as sequence segments, space transformation as sequence segments, summary and sub-narrative structural segments, cause and effect segments, turning segments, progressive segments, and parallel segments. Use this to understand the occurrence of objective things , the law of development. No matter which paragraph type is used, it records the development of the story and people's understanding of things, that is, the content of the paragraph and the center of the paragraph. Like a sentence, it is also a narration of people, things, objects, and scenery. It also expresses a meaning. It is just to make a sentence clearer and more profound. (4) Chapter training. Chapters are composed of paragraphs. Through the knowledge of topic review, conception, material selection, chapter planning, formula and terminology and methods, through the four expression methods of narration, description, lyricism, and argumentation, the beginning and end of the article, the transition and echo methods, and the knowledge and methods of various article genres. Learn to write narrative and practical articles with a clear focus, complete meaning, and appropriate detail. (5) Life-scene training. Use life-scene training to better understand composition writing by "starting from the content". Through various composition teaching activities, such as "Determining the Center Seminar", "Material Selection Seminar", and "Composition Consultation" "Meeting", "Xiao Zhuge Question Review Meeting", and "Wonderful Word Competition", you can learn composition knowledge and writing methods vividly and concretely from the activities. In addition, you can also carry out various activities inside and outside the school, such as rope skipping, tug of war, shuttlecock kicking , ball games, and endorsement competitions, so as to learn how to write competition compositions; carry out voluntary labor inside and outside the school, and learn how to write about labor scenes; hold poetry recitations and lectures, and learn how to write about meeting scenes and experiences at meetings; and browse famous places through visits Historical sites, learn how to write visit notes and travel notes. Learn observation methods and pay attention to things and events around you. "Everything you pay attention to is learning, and understanding human feelings is writing." Through on-site life composition, we further realize that life is fertile ground for composition. Thus, Learn to speak truth, express true feelings, cultivate sentiments of truth, goodness, and beauty, and cultivate good writing style. Implement "mutual evaluation and mutual modification" to cultivate students' independent thinking and creativity. After students write their compositions, they are organized to be reviewed in the group. First learn the advantages of other people's compositions, and then use a critical eye to point out the shortcomings in each other's compositions and point out suggestions for improvement. Then write again on this basis, so that students will gain something every time they write. Write honest words of your own." "Write your own honest words" is what the old educator Mr. Ye Shengtao said. It aims to create a colorful world of "autonomous" composition. The so-called "autonomy" means not being restricted by rules and regulations, allowing students to think freely and write freely. "Autonomy" "Composition is "speaking from the heart", acting spontaneously, showing one's own style and reflecting one's distinctive personality.

7. Mathematics diary 400 words for sixth grade primary school

When I was in elementary school, my math diary was to write about the practical problems I encountered in my life that day that could be answered with the mathematical knowledge I had learned. Well, most of them were Just made up.

Date: Week: Weather:

Topic:

In life, we often have to use mathematics. For example, when we go shopping on the street, we have to calculate Money, this is the most realistic. For another example, when we line up for exercises, we have to arrange them into reasonable groups according to the number of people in the class. Therefore, mathematics is everywhere in life!

Today, I saw a round flower bed downstairs with many brightly colored flowers planted in it. Some were fully blooming, like a bright smiling face, and some were half-open, like a shy little girl. , some are in bud, like an unopened umbrella.

There are three kinds of flowers in the flower bed, magnolia, roses, peonies, and rhododendrons. There are 400 flowers in one flower bed. The uncle who watered the flowers said that magnolia accounts for 1/4 of all flowers, and roses account for 1/4 of all flowers after removing magnolia. 1/3 of the total number of flowers, peonies account for 1/2 of the total number of flowers after excluding magnolias and roses, and the last one is azalea. Therefore, I used the mathematical knowledge I learned to perform a calculation and got:

Magnolia: 400*1/4=100 (flowers)

Rose: (400-100)*1/3=100 (flowers)

Peony: (400-100* 2)*1/2=100 (flowers)

Rhododendron: 400-100*3=100 (flowers)

From this I found that although every answer is the same, the expression The method of measuring is different, the amount of unit one is also different, and the score of expressing each flower is also different.

The uncle also said that the radius of this flower bed is 5m, so I calculated the area of ??the flower bed again and got:

S circle = πr2

=3.14*52 (2 here means square, well, you should understand)

=3.14*25

=78.5(m2)

Today, I discovered that mathematics is used very frequently in life, so we must learn mathematics well! (The finishing touch, this is the purpose of the teacher, so you must write it!)