Three elementary school students crossing the road, third grade essay
Based on context alone Crossing the Road In our daily life, crossing the road is a seemingly ordinary but very important thing. Today, I'm going to tell you the story of three third graders crossing the road. These three primary school students were Xiao Ming, Xiao Hong, and Xiao Gang. They were classmates. They went to school together and went home together every day. After school that afternoon, they went home together as usual. When they arrived at the roadside, the scene of heavy traffic made their expressions become serious. Cars and motorcycles whizzed past on the road. The noise seemed to remind them to be careful when crossing the road. Xiao Ming was a cautious child. He stood by the roadside and stared at the traffic light. He kept muttering," Stop at the red light. Go at the green light. Wait for the yellow light." Xiao Hong and Xiao Gang also stood straight at the side, their eyes filled with nervousness. The moment the signal light turned from red to green, Xiaoming took a step forward. He looked left and right before slowly walking across the road. Xiao Hong and Xiao Gang followed closely behind him. They walked at a moderate pace, as orderly as if they were queuing up for class exercises at school. However, halfway through, Xiao Gang's attention was suddenly attracted by a puppy by the roadside and he slowed down. " Xiao Gang!" Xiao Hong tugged at the corner of his shirt and whispered," Focus on crossing the road. Don't get distracted." Xiao Gang came back to his senses and quickly followed the team. Finally, they successfully reached the other side of the road. The three of them heaved a sigh of relief and smiled brightly. "It's like a small test every time we cross the road," said Xiao Ming. " Yes," Xiao Hong nodded in agreement." We must follow the traffic rules. That way, we can go home safely." "I won't be distracted next time." Xiao Gang scratched his head. Through the experience of crossing the road, the three primary school students had a deeper understanding of the importance of obeying traffic rules, and their careful crossing of the road had become a sight of order on the street. An Unforgettable Road Crossing Experience As third-graders, we will encounter many small things on the road of growth. These small things are like stars that embellish our lives. And that time when my three friends crossed the road, it was like the brightest star in my mind, unforgettable. I am one of the primary school students. My name is Xiao Li. The other two are Xiao Hui and Xiao Min. It was a sunny day. We talked and laughed as we walked home after school. Soon, we arrived at the intersection. The traffic at the intersection was very busy. There were cars one after another, like a never-ending river. The three of us stood by the roadside and looked at the cars coming and going. We were a little afraid. "We must wait for the green light to come on before we can leave," Xiao Hui said. "Okay," Min and I answered in unison. We stared at the signal light without blinking. The light turned green and we started crossing the road like soldiers who had received orders. Xiao Hui walked at the front. He was like a little adult, stretching out his arms to protect us. I held Xiao Min's hand tightly and followed Xiao Hui. Suddenly, a motorcycle sped up just as the red light was about to light up. Xiao Hui reacted quickly and shouted,"Stop!" The three of us immediately stopped. The motorcycle brushed past us and scared us so much that we broke out in cold sweat. " Why did he run the red light? It's too dangerous," Little Min said with tears in her eyes. "Don't be afraid, Little Min. We just have to follow the rules," I comforted her. Xiao Hui patted Xiao Min's shoulder and said,"Yes, let's continue walking." Thus, we pulled ourselves together and successfully crossed the road. Although the experience of crossing the road was a little thrilling, it also made us understand that it was very important to abide by the traffic rules at all times. It was like an umbrella that protected our safety. " Three Primary School Students Crossing the Road " On the streets of the city, countless stories were played out every day. The story of three third-grade primary school students crossing the road was ordinary, but it was full of meaning. These three primary school students were Little Yang, Little Ning, and Little Yao. It was an ordinary evening. The sunset glow on the horizon illuminated the entire street, draping the ground with a layer of orange-red gauze. The three of them had finished their day of study and were about to cross the street to buy stationery from the stationery store across the street. Standing by the roadside, Xiao Yang pointed at the stationery store opposite and said excitedly,"Look, that stationery store has the new notebook I want." Xiao Ning and Xiao Yao also looked on with anticipation. However, the road in front of him was like an obstacle because there was an endless stream of cars on the road. They waited patiently for the traffic lights to change. Xiao Yao was an attentive girl. She saw an old lady waiting to cross the road beside her. She said to Xiao Yang and Xiao Ning," Let's cross the road with the old lady later." Little Yang and Little Ning nodded in agreement. The green light lit up. Xiao Yang walked in front. He walked to the old lady's side first and said softly," Grandma, let's cross the road together." "Alright, you're really good children," the old lady said with a kind smile. Hence, Xiao Yang held onto the old lady's arm, while Xiao Ning and Xiao Yao protected her on both sides. The group of five slowly walked across the road. As they crossed the road, Xiao Ning kept reminding everyone," Everyone, slow down. Pay attention to the cars." When the cars saw them crossing the road, they slowed down. Some drivers even looked at them approvingly. Just like that, they safely reached the other side of the road. "We did a good thing," Xiao Yao said happily. Xiao Yang and Xiao Ning also revealed proud smiles. This little experience of crossing the road not only allowed them to reach their destination smoothly, but also taught them to help others and obey the traffic rules. Read more exciting novels for free
Third Grade Elementary School Essay
The essay writing of the third grade primary school students was an important part of Chinese learning. There were many types of third-year essays, such as describing people, things, scenes, and things around them. When describing a character, it might involve describing the appearance, personality, behavior, and other characteristics of the character. For example, describing a classmate with many characteristics, or describing a teacher with many changes. When describing things, one could elaborate on the appearance, characteristics, etc. of the object, such as the description of apples, from the formation of its color to the taste. There was also a description of his after-school life, including activities such as playing table tennis. It would involve the process of the activity, feelings, and so on. Some of the essays would be written according to the requirements of the unit. For example, the first unit of the third grade's Chinese writing,"Guess Who He Is," would allow the reader to guess through the description of the character's appearance, preferences, and other aspects. The sixth unit of the third grade's second volume,"Those Unique People Around You", would focus on portraying the uniqueness of the character. In addition, there were also some books that would help improve the writing level of third-year essays. By introducing writing techniques and other methods, students could improve their writing skills from the basics to the depths.
Third grade elementary school essay model essay
" Third-year Thrifty and Frugal Essay." In this happy society, where there are plenty of things, the sense of thrift is often neglected. But in reality, our country does not have sufficient resources. For example, toilet paper was excessively wasted, but the coverage of trees in our country was low, and there were many deserts. The reduction of trees also caused smog. At the same time, China's mines were only enough for 30 years, and the per capital mines were far lower than the world average. Even Xi'an began to lack water. Regardless of whether they were rich or poor, high or low, they should save resources and live in harmony with nature to create a better tomorrow for future generations. I learned a lot of family stories from " A Good Family Style in a New Era." Although I didn't know the meaning of family style, my parents 'behavior made me understand a lot. The first time I bought a collection book, my mother asked me to choose a practical book instead of a good-looking one. This is the family style of my family. I hope it can be passed down from generation to generation, because family style is positive energy, and everyone should start from themselves to carry forward the national spirit. Diligence and thrift is a traditional Chinese virtue. I was taught by my parents not to be wasteful since I was young. I keep my pocket money in my piggy bank and never spend it recklessly. When I save up, I buy school supplies. There was once a guest at home, and his father bought beer to entertain him. After dinner, I collected the empty wine bottles, along with the usual milk boxes, beverage bottles, old newspapers, and cardboard boxes, and sold them to the waste collection station for 3.80 yuan. I was very happy and prepared to save the money to buy gifts for Grandpa or donate to people in need. In this way, they could get money, clean up the house, and protect the environment. It was killing three birds with one stone. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Third grade elementary school essay mother essay
The following are some examples of third grade elementary school essays about mothers: ** 1. Write about your mother's love and care ** 1. ** Sick care ** - The mother took good care of her child when he was sick. For example, when the child was seriously ill, the mother would stay by his side day and night, carrying water and soaking medicine. The child kicked the blanket because he couldn't sleep well because of his illness. His mother got up many times at night to cover him with the blanket. The child found the medicine bitter and did not want to eat it. In order to let the child take the medicine, the mother ran from the community to the outside to buy candy. Under her mother's meticulous care, the child recovered, but her mother collapsed from exhaustion. - When the child had stomach problems, he didn't want to eat this and couldn't eat that. The mother was very anxious and asked for leave to accompany the child day and night. The mother's love seemed to have touched the bacteria. The child's condition improved, but the mother had more white hair and wrinkles. 2. ** Giving Strength ** - The child was afraid of tooth extraction and hid when he saw the doctor. The mother used her smile to give the child strength and let the child walk to the doctor with determination. Before the mother went to pay, she gave the child a smile again. This time, the child did not cry for a long time like before. It was pulled out very quickly. The mother showed a gratified smile when she saw it. ** Two, write about mother's hard work ** 1. ** Daily chores ** - Her mother was very hardworking. She had a pair of bright eyes, a sensitive nose, and a greedy mouth. She liked sports. At home, she swept the floor, washed the dishes, wiped the table, mopped the floor, and cooked. Even though her child was sick and did not have time to clean, she was still cleaning late at night. - Her mother was of medium height and thin. She was the first to get up every morning to make a nutritious breakfast. After sending her child to school, she went to buy vegetables before going to work. When he was free at noon, he would go home to clean up the house and tidy up the room. If he was on a business trip, he would prepare dishes for his family and put them in the refrigerator. In the afternoon, he would pick up his children from school on time, go home to cook, supervise his children to do their homework, and sometimes accompany his children to practice the piano. He could only do his own things late at night. Sometimes, with a phone call in the middle of the night, her mother would go straight to the laboratory to work all night. 2. ** I insist on doing housework even when I'm sick ** - Her mother was very ill and had to go to several hospitals to be cured. However, after she came back, she still insisted on doing housework. In the middle of the night, she remembered that she had not washed the dishes and wiped the table, and she would still get up to do it. ** 3. Write about other aspects of Mom ** 1. ** Image and Identity ** - Her mother was a teacher. She was not tall but she was very knowledgeable. She was dressed in a dignified manner, had long hair, big eyes, a high nose bridge, and a small mouth. When she spoke, she was talkative and reasonable. - A mother was like an encyclopedia, telling her child stories about the Milky Way and patiently answering her child's homework questions. She was strict with her children in their studies. In the morning, she would wake her children up to skip rope, play the piano, and write calligraphy. In the evening, she would take care of her children's homework, listen to English, and point out mistakes to cultivate habits. - When a mother treated her child with other children, she would educate her child to be tolerant and courteous. For example, when relatives and children came to play and quarrel, she would ask her child to give in to the other party; when brothers and sisters came to play, she would also ask her child to be courteous. In addition, in the eyes of children, mothers had many interesting images. For example, an old hen would wake her child up every morning. She was a beautiful and irritable person. Although the child would expose her mother's shortcomings, the mother also had many advantages, such as being willing to spend money on the child. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school students 'fire safety observation, 200-word essay, third grade
" Fire Safety Reflection " After reading the content related to fire safety, I understand its importance. Fires were terrible. They could destroy homes and take lives. I learned a lot of knowledge, such as being calm when there is a fire, using a fire extinguisher for small fires, and calling 119 and telling the address for big fires. The electrical appliances were on fire, and the power was cut off first. The oil pan was on fire, and the lid was covered. You can't take the elevator when you escape. You have to cover your mouth and nose with a wet towel and bend down to escape. You can't play with fire and stay away from flammable and explosive materials. We must raise our awareness of fire prevention and prevent fires. This is not only to protect ourselves, but also to be responsible for our families and society. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school essay cartoon, third grade
The following is an example of a third-grade elementary school student's feedback on the animated film "Dream Seeker": " Thoughts on the Journey to Dreams " Dream Chaser was a very exciting animated film. The movie told the story of Mig's wonderful experience. Mig lived in a family that had a taboo on music, but he loved music. In the story, Mikel accidentally entered the world of the undead in order to participate in his great-great-grandfather Drakus 'guitar square performance. In order to return to the world of the living, he sought blessings from his great-great-grandmother, but his great-great-grandmother asked him not to touch music. Mi Ge pretended to agree, but after returning to the world of the living, he broke the agreement and returned to the world of the dead. Later, he met his real great-great-grandfather, Ector, and found out that Dracus was a bad person. He was the one who murdered Ector. I learned a lot from this movie. I saw Mig bravely pursue his dream of music. Despite his family's opposition, he didn't give up. The world of the undead in the movie was very interesting. The colorful scenes and unique characters attracted me deeply. What moved me the most was when Mig sang the song that great-great-grandfather wanted to sing for great-grandmother. It reminded great-grandmother of her father, which reflected the power of memory and kinship. From this movie, I understand that we have to be like Mig, stick to what we love and not be easily influenced by others. At the same time, family and kinship are also extremely precious. Another example was the feedback from Monster University: " Thoughts on Monster University." Monster University was a very interesting movie. It was about the story of the little monster Mike. Mike looked very unremarkable and not scary at all, but he dreamed of becoming an outstanding monster master. He worked very hard and got into Monster University through his diligence. In university, his classmates looked down on him. For example, Furious Bully bullied Mike just because he was born with a fierce and terrifying appearance, and he didn't study hard. But Mike didn't care and helped hairy monster everywhere. Later, they became good friends. In the end, the team of monsters, which was looked down upon by others, won the championship under Mike's leadership. Mike also got the job he wanted the most. This movie told us that even if we were born with bad conditions and were not as scary as Mike, as long as we worked hard and worked hard, we could succeed. We have to be like Mike, hardworking and full of positive energy. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Sixth grade elementary school essay topic
The following are some of the "show your talents" essay topics suitable for the sixth grade: 1. "Me on the Stage: The Moment to Show Your Skills": If the students have talent performance experience, this topic allows them to describe the scene, mood, and applause and recognition they received when they displayed their talents on stage (such as singing, dancing, playing instruments, etc.). 2. "Culinary Competition: My Show": For students who have cooking experience, they can write about their cooking process, such as how to carefully prepare ingredients, skillfully match seasonings, and finally, the sense of accomplishment when they make delicious dishes. 3. "Show Your Skills on the Sports Field": If students were good at sports, they could write about their experiences in sports competitions (such as running, long jump, basketball games, etc.) to show their strength and win honor for the team or themselves. 4. "Examination Room: My Place to Show Your Skills": It talked about how to use the knowledge you have learned to calmly answer questions in the exam and play to your best level, as well as the preparation before the exam and the psychological state during the exam. 5. "Craftsmanship: A creative journey to show off your skills": suitable for students who like crafts. It describes the process of showing creativity and skills when making crafts (such as origami, pottery, carpentry, etc.). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school second grade essay on cartoons
The following are some of the main points of the second grade essay on cartoons: ** I. Writing structure ** 1. ** Beginning ** - He directly pointed out the name of his favorite cartoon, for example," My favorite cartoon is Journey to the West." 2. ** Middle part ** - ** Character Introduction ** - It introduced the characters in the cartoon, such as Sun Wukong, Tang Sanzang, Zhu Bajie, and Monk Sha in Journey to the West. He also mentioned the characters he liked and the reasons why, such as," I like Sun Wukong the most because he knows the seventy-two transformations. He also has the magical Jingu Staff that can change its size. He is very brave and fearless. He can subdue demons and devils." - He could also mention people he didn't like, like " I don't like Zhu Bajie because he's lazy." - ** Story content ** - It briefly described the story of the cartoon. For example," Bear Haunt " mainly talked about the story of Big Bear and Big Bear fighting with Bald Head Qiang. Big Bear and Big Bear stopped Bald Head Qiang from cutting down trees in order to protect the forest home. - When telling the story, he could mention some memorable plots, such as in Journey to the West, Sun Wukong defeated the monster with the Golden Cudgel, and in the story of Flaming Mountain, Sun Wukong went through difficulties to get the banana fan to fan the fire of Flaming Mountain. 3. ** Ending ** - They could talk about what they had learned from the cartoon, such as from "Bears Haunt", they learned to care for the ecology and protect the forest; from "Journey to the West", they learned to work together and overcome difficulties, etc. Finally, they could recommend this cartoon again, such as "Journey to the West" is a very good cartoon, everyone can go and watch it." ** 2. Writing examples ** "My favorite cartoon" My favorite cartoon is Nezha. There are many interesting characters in this cartoon, and I like Nezha the most. Nezha had the Heaven Sash and the Universe Ring. He was especially brave. Although he was a child, he was not afraid of those evil monsters at all. This cartoon was about Nezha who faced many difficulties since he was born. He was misunderstood by people, but he did not become evil because of it. He used his own power to protect the people of Chentang Pass. Once, when the monsters in the sea came to make trouble, Nezha used the Mixed Sky Silk and the Universe Ring to fight the monsters and finally successfully drove them away. I learned from Nezha to face difficulties bravely and not be afraid of others 'misunderstandings. I think Nezha is a great animated film. I hope everyone will like it too. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school students running essay details
When describing the details of a primary school student's running essay, one could start from many aspects. * * 1. Character preparation stage ** 1. * * Description of attire ** - For example, he could write,"He was wearing a light sportswear with a small school badge printed on his blue sports short-sleeved shirt, as if to express his love for school. She was wearing a pair of black sports shorts, and the bottom of her pants was slightly rolled up, revealing her slender but energetic calves. The white sports shoes on his feet are tightly tied, like a little soldier ready to set off at any time." 2. * * Psychological Description ** - "He stood at the start of the track, his heart thumping like a little rabbit. I'm both nervous and excited about starting to run. I keep thinking about the running techniques that the teacher told me, secretly encouraging myself." * * 2. Description of the running process ** 1. * * Body feeling ** - "He had only run a few steps when he felt his breathing become hurried. It was as if there was a small fire burning in his throat, and every breath he took was slightly painful. My legs are also as heavy as lead, and my footsteps are getting slower and slower. The muscles in my calves seem to be pricked by countless small needles, and the soreness and numbness keep spreading up." - Or "His feet fell lightly on the track, each step full of strength. His breathing was even and rhythmic, just like a light tune. Sweat oozed out from his forehead and slowly slid down his cheeks, but he didn't feel tired at all. Instead, he felt full of vitality, as if he had endless energy." 2. * * Description of actions ** - "His arms moved quickly like two small propellers, driving his body forward. He lifted and lowered his legs in turn. Every step he took was huge, as if he was crossing invisible obstacles. Leaning forward slightly, your eyes are firmly looking forward, as if the end is right in front of you." - His posture was a little strange when he was running. His arms were swaying unharmoniously. Sometimes, he swung them too far and almost hit the students next to him. Her legs were always moving up and down, and her footsteps were messy, like a little duck that had just learned to walk." 3. * * Description of the surrounding environment (if available)** - "He was running on the track in the school. The green trees beside the track were like loyal guards, standing quietly. Sunlight shone through the gaps of the leaves, forming mottled shadows on the ground. The breeze blew gently, and the leaves rustled as if they were cheering for him." - Or,"When he was running on the field, the surrounding students shouted one after another. On the other side of the field, the students in the physical education class are doing all kinds of sports. The sound of the basketball bouncing and falling on the ground, the sound of the skipping rope passing through the air, and the sound of his running footsteps are intertwined." * * 3. Description of the End of Running ** 1. * * Physical condition ** - "After running, he put his hands on his knees and panted heavily. Sweat dripped from his chin to the ground like raindrops. His clothes were soaked in sweat and stuck to his back. - Or,"After he finished running easily, he was only panting slightly. His face was slightly flushed, and there was only a thin layer of sweat on his forehead, as if the morning dew had just sprinkled on the flowers." 2. * * Mental feelings ** - "He looked at the distance he had run and felt a sense of accomplishment. Although his body was a little tired, the feeling of overcoming difficulties and persevering to the end made him feel extremely proud. He secretly thought that he must run faster next time." - Or,"He was a little depressed after the run, feeling that he hadn't performed as well as he should have. He secretly blamed himself for slowing down in the middle of the run and made up his mind to train harder next time." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school essay, third grade narrative essay, model essay
Here are some examples of third-year narrative essays: ** My After-School Life ** My after-school life is rich and colorful, such as playing table tennis, practicing calligraphy, skating, reading and so on are my after-school activities, but I love skating the most. One summer night, Dad took me to the ice-skating rink. I was very happy. When they arrived at the skating rink, there were many people there. When I skated, I saw some people skating as fast as a bird flying, some people running around like a pony, and some people were like acrobatics stars who kept changing their patterns. Dad and I also started to slide. My skills were not good, so I slid slowly. Dad was very confident and slid very fast. When crossing the bend, Dad lost his footing and fell, but he still didn't give up and continued to slide. This spirit is worth learning. Skating has enriched my after-school life and brought me happiness and confidence. I really like skating. ** Mountain Climbing Journey ** One day during the summer vacation, Dad took Mom and I to climb Dazhai Mountain. It was a cloudless day, so we set off early, just as the sun rose. At the foot of the mountain, the mountain looked very high. I couldn't even see the road. Dad said to climb up the rocks, and we climbed carefully because the road was steep and steep. Mom and Dad asked me to be the team leader to lead them forward. I climbed up excitedly. After climbing for a while, we were panting and tired, so we found a rock to rest. Looking down from the mountain, the houses in the village became very small, the cars on the road were like small ants, and the mountains in the distance stretched to the horizon. After a break, we continued to climb and finally reached the top of the mountain at noon. After lunch, we had a lot of beautiful scenery. Among them, the three mountain streams were especially spectacular. The four peaks were steep and surrounded by cliffs, forming three very deep mountain streams. In the afternoon, I went down the mountain facing the setting sun. I wasn't tired at all under the red sunset. The beautiful scenery of Dazhai Mountain made me linger. ** About Mother ** If my mother was a big tree, I would like to add a little green to her; if my mother was a bouquet of flowers, I would like to offer her a trace of fragrance; if my mother was a blue sky, I would like to become a cloud for her. When I saw my mother's thin body by chance, I realized that she had sacrificed too much for me. His mother's face was much paler, and her movements were slower. Her terrifying white hair gradually swallowed her black hair, and the wrinkles on her forehead deepened. That morning, her mother said that she had found a job and that it was not far from home. When I came home from school in the afternoon, I saw her lying on the sofa as if she was asleep. Her hair was covered in dust and she looked very tired. Under the dim light at night, she squinted her eyes and massaged her legs. I thought she must be very tired from her work. I covered my mouth and didn't dare to make a sound. My nose was sore and tears filled my eyes. I still remember when I cut myself barefooted and the blood kept flowing… ** Guess Who She Is ** She had a pair of watery eyes, curved eyebrows, a round little face, and a lot of hair that hung down like silk. She was almost nine years old. She loved to be angry. If you accidentally provoked her, she would stare at you with angry eyes as if she wanted to eat you up. She liked to run, and she was as fast as an arrow during the physical education class. She overtook one student after another and finally won first place. She also loved reading. Once, when a friend came to play, she was still reading seriously. When her friend saw her uncle reading the newspaper and wanted to read, she immediately told her mother that she wanted to go back and read. After her mother agreed, she immediately ran back. That girl was me, a child who was about to enter third grade in September. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
All the formulas for elementary school students from grade 1 to grade 5
I. Perimeter Formula 1. The circumference of the rectangular shape: C=(a + b)×2 (A is the length, B is the width) 2. The circumference of the square: C = 4a (A is the length of the side) 3. The circumference of a circle: <c =<pi> d =<2 <pi> r>(<d> is the diameter,<r> is the radius) II. Area Formula 1. Area of the Rectangle: 2. The area of the square: S = a×a = a2 3. The area of the triangle: S = ah div2 (A is the base, h is the height) 4. The area of the quadrilateral: 5. The area of the echelon: S=(a + b)h div2 (A is the top, B is the bottom, and H is the height) 3. Three-dimensional figure surface area formula (Part 1 - 5) 1. The surface area of a cuboid: S=(ab + ah + bh)×2 (A is length, B is width, and H is height) IV. Volume Formula 1. Volume of the cuboid: 2. The volume of the cube: <V>= a×a×a = a cubic> 3. The volume of the cylinder: <V = Sh=<pi r ^h>>(<S> is the base area,<h> is the height, and <r> is the radius of the base) 4. Cone volume: <V>=<Pi> r> 2> Five, the calculation law formula 1. Commutative law of addition: <a + b = b + a> 2. The law of additivity: <a+(b + c)=(a + b)+c> 3. Commutative law of multiplication: <a×b = b×a> 4. The law of association of multiplication: <(a×b)×c = a×(b×c)> 5. Multiplication distribution law: <a×(b + c)=a×b + a×c> 6. Other formulas 1. Subtraction to addition: <a - b = a+(-b)> 2. Division to multiplication: <a> b = a×(1/b)> Seven, sum, difference, multiple problem formula 1. [(sum + difference) div2 = large number],[(sum-difference) div2 = small number] 2. <<p>> 3. <p></p>(Multiple- 1)= Decimals>,<p>(Decimals × Multiple = Large Numbers>)(Or <p>(Decimals + differences = Large Numbers>) 8. Formula for planting trees (non-closed route) 1. If trees are to be planted at both ends of the non-closed line: number of trees = number of sections +1 = total length/plant spacing +1, total length = plant spacing ×(number of trees- 1), plant spacing = total length/(number of trees- 1) 2. If trees are to be planted at one end of the non-closed line and not at the other end, the number of trees = the number of sections = the total length/the distance between trees, the total length = the distance between trees × the number of trees, and the distance between trees = the total length/the number of trees 3. If you don't plant trees at both ends of the non-closed line, the number of trees = the number of sections- 1 = the total length of the plant spacing- 1, the total length = the plant spacing ×(number of trees + 1), and the plant spacing = the total length of the plant spacing (number of trees + 1). 9. Tree planting problem formula on the closed line: number of trees = number of sections = total length/plant spacing, total length = plant spacing × number of trees, plant spacing = total length/number of trees X. Formula for the Profits and Losses Problem 1. <<p>></p>> 2. <<<p></p><p>></p><p>></p>><p></p>>< 3. <<<p></p><p>><p>></p>><p></p>><p></p>><p></p>></p> Formula of the Encounter Problem 1. The distance of the encounter = speed and × time of the encounter 2. Time of encounter = distance of encounter/speed sum 3. Speed sum = encounter distance/encounter time 12. Pursuing the Problem Formula 1. Catching distance = speed difference x catching time 2. Time = distance/speed difference 3. Speed difference = catching distance/catching time Formula of Flowing Water Problem 1. Downstream speed = still water speed + current speed 2. Countercurrent speed = still water speed-current speed 3. Still water speed =((downstream speed + upstream speed) div2) 4. Water flow speed =((downstream speed-upstream speed) div2) Formula for Concentration Problem 1. The weight of solute + the weight of solution = the weight of solution 2. The weight of the solute divided by the weight of the solution ×100% = concentration 3. The weight of the solution x concentration = the weight of the solute 4. The weight of solute divided by concentration = the weight of solution Formula for the Problem of Profits and Discounts 1. profit = selling price-cost 2. Proficiency = Profits/Cost ×100%=((Selling Price/Cost- 1)× 100%) 3. Increase or decrease amount = principal x increase or decrease percentage 4. discount = actual selling price/original selling price ×100%(discount <1) 16. Formula for the interest problem (Using simple interest as an example) 1. interest = principal x interest rate x time Time Unit Conversion Formula 1. 1st century = 100 years 2. 1 year = 12 months (The big months (31 days) include January, March, May, July, August, October, and December; the small months (30 days) include April, June, September, and November; February 28 in ordinary years, February 29 in leap years, 365 days in ordinary years, and 366 days in leap years) 3. 1 day = 24 hours 4. 1 hour = 60 minutes 5. 1 minute = 60 seconds 6. 1 hour = 3600 seconds <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>