Mathematics Diary Sixth Grade

The day is coming to an end, and you must have a lot of thoughts. At this time, how can you leave down the most important diary. I believe many people will find it difficult to keep a diary. Below is the math diary I compiled for sixth grade. I hope it can help everyone. Mathematics Diary Grade 6 1

There is an old saying in China: "Just do the opposite." In fact, in some mathematical problems, we can also use this thinking method to solve problems.

In yesterday’s math class, the teacher gave us such an interesting math problem: There is a pond of lotus. The growth rate is doubling a day. It takes 20 days to fill the entire pond. Excuse me. On what day did it fill half the pond?

If we think according to the traditional method, we should start from the conditions and push forward step by step. Finally draw the conclusion. But this method doesn't work in this problem. At this time, I remembered the saying "do the opposite". So, I pushed forward from back to front: it takes 20 days to fill a pond. It is known that the growth rate of lotus is doubled a day, so half of the pond grew in 19 days. Originally it was doubling every day, but now it is decreasing by twice every day, so the answer to this question is 19 days.

By doing the opposite, with this idea, this problem can be easily solved. Mathematics Diary Grade 6 2

This summer vacation, my mother took me to Hong Kong Disneyland. Compared with mainland China, Hong Kong is very small, with a population of about 6.6 million and a total area of ??1,070 square kilometers. The smallest Disney park in the world, located on Hong Kong Island, has an area of ??only 126 hectares (310 acres). The tour guide said: "What if? I don’t even play, it only takes 18 minutes to walk around.” Do you think it’s too small? Let me show you my Disney trip!

First of all, we went to the Mickey Photo Studio to take pictures with Mickey and Minnie. When we got there, we saw: Wow! There was a long queue in front of the photo studio, almost 25 meters long. My mother and I tried our best to squeeze in. After finally finishing the photo, we went to the Cinderella Carousel to play again. I got on the wooden horse and took a closer look: there were three circles of the wooden horse, and there were 15 in each circle. I calculated: 15×3=45 (pieces) . Wow, so many! We walked around and around on it, feeling like the happy scene when riding horses on the prairie. The following fantasy space journey, Adventure World, Mini World, Lion King performance, and Mickey Awards Night all left a deep impression on me.

Things in Disney are very, very expensive. A bottle of Coke costs 17 yuan, which is more than ten yuan more than here. At lunch, a bowl of noodles costs 50 yuan. Have you ever eaten a bowl of noodles for 50 yuan? It’s really expensive! Before leaving Disney, everyone has to buy some souvenirs. My mother bought me a Disney princess umbrella, which cost a full 100 Hong Kong dollars. I thought about it again: each umbrella here only costs 20 yuan, 100÷20 =5 (hands), wow! This is too expensive!

When I got in the car and left Disneyland, my mother asked me: "How long did we play from 8 a.m. to 6:30 p.m. today?" I thought about it: 6 p.m. Half past 18 is also 18:30, 18:30 - 8:00 = 10:30.

The car started, and I reluctantly said goodbye like a Disney park: Goodbye, we will come back next time! Mathematics Diary Sixth Grade 3

This semester we learned about rectangles and cubes. When I first learned it, I always felt that these contents were not too difficult and did not require much mental effort. As long as you looked at the numbers carefully and applied the formulas for surface area and volume, there would be no problem if the calculations did not go wrong. But this morning, I have a new understanding and better understanding of them.

After getting up in the morning, as usual, my mother asked me to do ten math application questions. Today I was doing questions about the newly learned surface area of ??cuboids. The last question was like this: "The factory makes water pipes." , each one is 2 meters long, and the cross-section is a square with a circumference of 20 decimeters. How many square meters of iron sheet should be used to make 10 such water pipes? "I saw it, it was too simple! "Swipe, swipe, swipe" a few strokes, I quickly calculated it on the scratch paper, copied it onto the test paper, and then happily handed the test paper to my mother.

Mom looked at the test paper, glanced at me, and pointed to the last question: "Read the question and your calculations again.

"I read the question again and didn't think there was any problem: "It should be noted that the cross section talks about the perimeter, not the side length. But what I calculated was the circumference, and I wrote it correctly, Mom! "My mother took a sip of water and shook her head gently: "Read it again! "I raised my head and glanced at my mother. She didn't seem to be joking with me. I read it again word by word, but still didn't find anything: "That's right! Mom, what happened today? Mom asked: "Don't look at the question yet." Have you ever seen a water pipe? First think about what the water pipes are used for? "I felt a little confused: "Water pipes are used to deliver water. "Suddenly, I suddenly realized, "Oh - the water pipe is hollow, and the two cross-sections do not need to be calculated. "

When I finished correcting, my mother said earnestly: "Mathematics, like Chinese, is everywhere in life. It is not just about memorizing formulas. Application problems are to use mathematical knowledge and experience to solve real-life problems, and they must be related to reality. ”

Yes, “It is better to believe in books than to have no books at all.” The theories in books are limited after all, but the problems in reality are endless. Only by being able to use your brain and connect with practice can you try your best. Avoid making mistakes. There are no simple problems in the world. Problems that cannot be discovered are important problems. Being serious and flexible is the best way to reduce problems. Mathematics Diary for Grade 6 4

It happens all the time in life. The use of numbers can range from a small thing to a huge project. What I describe below is also a short story about numbers.

I made it during the Mid-Autumn Festival. I got a small steel scale, and I wanted to use this small steel scale to measure the density of the egg. I put the egg on the scale and measured the weight of the egg to be 0.605 kilograms, which means: in the "mass volume = density" "In the process, the "mass" is already known, so the key lies in the volume.

It is very difficult to find out the volume. Because the egg is an irregular shape, although it looks It looks like an ellipsoid, but it’s not a very standard ellipsoid.

“What should I do if I can’t use the volume formula of an ellipsoid? "I was thinking hard, "Can't we use Archimedes' law of buoyancy to calculate the volume? "I thought of this method, and Mashan started to make it. I first took out a bowl from the kitchen, and then filled it with water, but the water must be filled full.

I I put the bowl under the faucet, and the water flowed down bit by bit. I stared at the bowl with my eyes wide open, and my hands began to tremble, but I told myself: "Keep going, don't shake." "Finally, the water filled the bowl.

I quickly took out a washbasin from the toilet room. This washbasin must have no water at all, otherwise it will affect the data and cause The error was too big. I then wiped the basin clean with a dry towel, and put the bowl of water tremblingly into the basin. Then, I picked up the egg, put it on the top of the bowl, and put it in the basin again. Put it carefully into the bowl. At that moment, water overflowed from all sides of the bowl.

The water overflowed into the basin. The volume of the water in the basin was the volume of the egg. . I dropped the water in the basin into the measuring cylinder little by little, and read the number. The final result was 10.3 ml. In this way, the mass and volume were determined, and the density of the egg was determined. It’s calculated: 0.60510.3=0.058 (kg/ml). I’m very happy that the density of eggs is finally calculated.

Mathematics is always like this, progressing through constant exploration and exploration! Mathematics Diary for Grade 6 5

Numbers are everywhere in our lives. In the human world, numbers are indispensable. There are many numbers in life, such as license plate numbers and house doors. Number, page number, mobile phone number... etc. It can be seen how important and indispensable numbers are in our lives!

Yesterday, my mother bought some cherries and my mouth watered. I cried "Three Thousand Feet" immediately. Seeing my greedy look, my mother smiled and washed some cherries. I asked my mother, "Mom, how many cherries did you wash in one go?" Enough for who? "When my mother saw me like this, she couldn't help but want to tease me. Her eyes were rolling, as if she was thinking about something. After thinking for a moment, she took out a few cherries and said, "I'll give you a question. You're right, cherries." It's all yours! "I couldn't help it anymore and shouted to her to come up with the question quickly.

My mother paused and said, "If you count 2 2s, you'll have 1; if you count 5,5, you'll have 2; if you count 7, 7, you'll have 3. Just do the math." I picked up the pen and paper and ran back to the room to sit down. Next, I bit my pen and started thinking: First find their least common multiple... No! It is the greatest common factor! ...even more outrageous! I fell into thought again. Suddenly, I thought that I could use trial methods to "deal with" this problem. I tried one by one. Although I was trying, I didn't just randomly find a number and put it on it. First find a multiple of 2 and add 1. If it also meets the other two requirements, then it is this number. If not, there is no need to add 2 × () + 2... That is very troublesome. Just add a 2. . Just like that, I finally found the number - "17"!

Like an arrow that had left its string, I ran out of the room and shouted the answer to my mother. My mother smiled broadly and rewarded me with some cherries. I was very happy, not only because I got my favorite cherries, but also because I gained mathematical knowledge.

Mathematics is wonderful. It is like a kaleidoscope, from which we can see the world in all its forms. Classmates, let’s swim together in the ocean of mathematics!

- Mathematics Diary Sixth Grade 6

My sister and I attended the Sunshine Youth Summer Camp. My mother gave me 200 yuan pocket money. Not to mention how happy I am, I can finally make my own decisions and buy what I like. As soon as I got on the train, I started a crazy shopping spree: I bought a bottle of iced black tea for 10 yuan; a bag of peanuts for another 10 yuan; a bag of cumin mutton skewers for 10 yuan; three decks of poker cards. The cards cost 9 yuan, and a *** cost 39 yuan. 200-39=161 (yuan), and there is 161 yuan left. As soon as I got off the train, I got on the bus to the Expo site. There are more than 200 national pavilions in the Expo. We visited the United States Pavilion, the Pacific Union Pavilion, the Australian Pavilion, the Indonesian Pavilion, the Danish Pavilion, the Petroleum Pavilion, and the Thai Pavilion... We visited 22 national pavilions in one day. The ones that impressed me the most were the American Pavilion and the Pacific Union Pavilion. The U.S. Pavilion has three major exhibition halls, and the Pacific Joint Pavilion has 14 Pacific countries and 2 national organizations participating in the exhibition, showing the people of the world the beautiful and magical natural landscapes, unique cultural environment and passionate folk customs of the Pacific island countries. style.

Here I bought a Haibao keychain for my mother with 15 yuan. I spent 10 yuan to buy a Kongming fan for my father, and also spent 10 yuan to buy myself a bamboo sword. On the train back to Zhengzhou, I bought a massager for my father with 20 yuan, a toy for my brother with 10 yuan, and three boxes of fruits for 30 yuan. A bag of food, 39+15+2310×4=144 (yuan), 200-144=56 (yuan). When I got home, my mother first praised me. When I went on a trip, I remembered my parents and younger brother, and then criticized me. I shouldn't spend money indiscriminately. Things on the train are expensive and bad, so I shouldn't buy them indiscriminately. After listening to my parents’ analysis and teachings, I did feel that I was a bit extravagant and that some money really shouldn’t be spent. This trip gave me a great education. Mathematics Diary Sixth Grade 7

I understand that the teacher has great expectations for me, but I still did not do well in the exam. I'm very sorry about this. But since I made mistakes, I have to correct them. Therefore, through the exam, I also thought about a lot of things that I must learn in the future.

First of all, I have to get rid of the bad habit of not reading the questions carefully during the exam. Sometimes I tend to look at the front of the question and write down the questions behind it, but I make a lot of mistakes. This may also have something to do with question-answering skills. In short, through future practice, I must carefully review the questions during the exam, read the questions carefully, and fill in the information accurately. If time permits, check it a few more times and do not allow yourself to make mistakes like this again.

Secondly, I also need to strengthen the practice of the four main subjects of Chinese, mathematics, English, and physics. Through the exam, I understood everyone's strengths and understood the truth that there are mountains outside the mountains and there are people outside the people. On weekdays, everyone gathers together to discuss and study questions, so there is no obvious difference. But after taking the exam, it was not difficult to find that there were so many exam questions that I had never seen before. Alas, I only blame myself for doing too few exercises. I can't allow myself to continue to be this bad, I must work harder. I want to learn lessons from this exam and use it as a basis to lay a solid foundation and prepare for the next exam.

The most valuable thing about exam skills is practice. In life, I also need to strengthen my practice and review. I will make a detailed review plan before the exam, so I will no longer be in a hurry and have no learning goals. In daily life, I need to learn to accumulate and apply. In Chinese, I need to accumulate some beautiful words and sentences, and beautiful fragments; in mathematics, I need to practice more difficult problems and memorize key points; in physics, I need to do more experiments, memorize more theorems, and practice language organization skills; in English, I need to practice grammar. And key and difficult points, practice questions are also a good way to improve your English.

I want to say to the teachers: "I hope the teachers will not lose confidence in me. Although I did not do well in the exam this time, I believe in myself and can break through myself. I must be able to do it in the next exam." Try your best! Please believe me." Mathematics Diary Grade 8

Monday, March 10, sunny

Preview is a task assigned by the teacher and a process for us to learn by ourselves. However, this preview made me very nervous. My head is a pile of mush - it's a mess! No matter how hard I look and how hard I think, I still can't figure it out. I had to ask my classmates. But everyone didn’t quite understand it. I was still confused after hearing this, and this “confusion” seemed to be even muddier than before. Looking at the colorful "pictures" in the book, which seemed to be covered with stems, made me dazzled. I thought it was time for me to get reading glasses. After thinking about it for a long time, I could only figure out that the scale is a ratio, which is composed of the distance on the picture and the actual distance, that is, the distance on the picture is greater than the actual distance. I put question marks on the books and waited for the teacher to clear the air for me.

At night, I had a dream. I dreamed that I had learned the scale, took the test, and got 100 points. Looking at the red ticks on the test paper, I feel happy.

After finally getting through a few classes, it was time for the math class, and I was already very excited. The first is that you can solve the mystery in your heart, and the second is that you can learn new knowledge.

The teacher is here. He led us to explore the knowledge of "scale", how to find the scale, etc. I gradually understood. The mystery in my heart gradually disappeared like fog. In fact, as long as the units of the distance on the map and the actual distance are unified, and then their ratio is simplified, it becomes a scale. Of course, we can also use the scale of a picture and the actual distance to find the distance on the picture. Or you can calculate the actual distance based on the distance and scale on the map. The most core ones are the three related formulas. To learn mathematics, you need to master it! In this way, you won’t be afraid of various questions! As long as you master this method, every problem in this area will be easy to solve, because the problem-solving method is clear, and as long as you are willing to think, you can definitely do it. At the same time, the scale also has antecedent and consequent terms, so you can understand the scale in the same way as you understand the ratio. Mathematics Diary Grade 6 9

After studying the previous 4 units, my grades have not improved. The best score was 82 points, and the worst score was 23 points. This score came when I was at my most vulnerable. I was very, very sad. This made me very sad. I have obviously worked very hard, but why did I Can't your grades be improved? I found the "why" of mid-term, it was because I didn't persevere, do more, practice more, watch more, and learn more. That's why my grades didn't improve. My mother told me that I should preview and review every night in order to improve my grades, but I didn't persist. This result also hit me hard. It was precisely because of this that I worked hard and insisted on doing exercises every night.

The second reason is that I sometimes wandered off in class and did not listen carefully to the teacher's lectures. As a result, I did not listen to the main content of the teacher's lectures, and I was unwilling to do more exercises. I was lazy, and the teacher asked me questions I was the one who looked confused and didn’t know anything when I asked, so most of the time I did my homework, I couldn’t do it. I didn’t ask my parents or teachers, and just copied my classmates’. Only now do I understand that other people’s things belong to others after all, and I copied them. Once upon a time, it cannot be copied for a lifetime.

The third reason is because I read early and did not go to school early and read early on time. As a result, I did not have a firm grasp of many knowledge points. There are many formulas and calculation methods in "Gold Medal Study Plan", but I failed to do so. I haven’t mastered it, so I still have to pay attention to this.

The fourth reason is because I don’t have enough perseverance. I told you to study hard and make progress every day in Three Minutes. I told you to do exercises tomorrow. I told you to read early every morning, but what? I didn't do it, which shows that I don't have enough perseverance, I need to persist! The skill of mathematics is to do more, practice more, and listen more. If I don't listen carefully in class and don't do my homework seriously, then I won't be able to perform well in mathematics, and I won't be able to learn mathematics well. I do the questions every day, just like a stupid bird practicing diligently. I insist on doing a page of oral arithmetic questions every day. I believe that as long as I practice more questions, listen more, and learn more, I believe I can do it! For myself, I have to work hard and learn mathematics well. Study hard and make progress every day! ! Mathematics Diary Sixth Grade 10

Every student has his or her own favorite courses, but I like mathematics. The teacher’s lectures are sometimes serious and sometimes humorous, which brings us endless happiness.

I deeply remember that time, when the school bell rang, we were all waiting for the teacher quietly, looking forward to the mini games in each class. At this time, the teacher said: This is a lesson about: 'Count 24 Point's class time. We all interacted with the teacher with questions and curiosity.

The rules of the game are: use poker cards to randomly draw 3 or 4 cards from A (1) to (10), add, subtract, multiply and divide at will, and the result must be 24. The rules seem to be simple. Who will win in the end between me and my opponent?

The game started like this. For the first time, I drew four cards, 3, 6, 7, and 9, with doubts and confusion. I thought about it with a frown on my face. I still had no clue, so I had to wait a little longer. Once, when I saw that my opponents had calculated 24 points, I was nervous and encouraged myself to be able to calculate 24 points next time.

The game is still going on. For the second time, I drew four cards, 2, 5, 7, and 10, with a nervous and sure-to-win mood. I silently calculated in my mind that as long as they were all added up, wouldn’t it equal 24? Ordered!

The game became more and more intense. After the third time, I started to regain my confidence and rushed to catch up. I drew four cards 2, 5, 6, and 8. After thinking about it, 2_5+6+8=24, I calculated 24 points again. Victory was achieved.

Although my three-chance game has ended, as a bystander, I watched other students carefully choosing cards. At this time, I was also very excited. In this fierce competition In the atmosphere, we happily and efficiently mastered the knowledge of this lesson, flexibly used addition, subtraction, multiplication and division, and skillfully and accurately calculated.

I understand from this: The first game told me that failure is the mother of success, the second game told me that self-confidence is the first secret of success, and the third game taught me that where there is a will, there is a way. .

This is my math class, the math class I like. Mathematics Diary Sixth Grade 11

Today, our math test tested our execution ability.

Teacher Mo came to supervise our math test. It is better to say that it is an invigilated exam, but it is better to say that there is no one to invigilate the exam. Teacher Mo will prepare some courseware on the desk. When I got the math test paper, it wasn't too difficult, so I started doing it. To do math, you need to use scratch paper. Therefore, I specially prepared some scratch paper. If you encounter questions that you are not sure about or have not solved, you can do the math on the scratch paper first. This will make it easy. Soon, I finished one side and turned to the second side. I did it very seriously, and there was almost no sound around me. There was a "crash". I wanted to know what the sound was, so I put down my pen and followed the sound. It turned out that a classmate's compass accidentally fell to the ground. Out of boredom, I watched with interest. Soon , I found that this classmate did not do it accidentally, but on purpose. She passed the compass to another classmate and prepared to draw it across the ground! Probably that classmate didn’t have a compass, so she borrowed it from her classmate! After this scene, I started to do the questions seriously again. Suddenly, Deng Xin asked me to borrow a compass, so I lent it to her without saying a word. But gradually later, I was stumped by the application questions. This question scored four points! Plus one point! I couldn't pass the excellence line, I thought to myself, and couldn't help but start looking around. I glanced at the blackboard, and was startled by the word "Integrity" on the blackboard. I immediately withdrew my peripheral vision, thought carefully, and didn't dare to move for a long time.

When it was time to collect the test papers, a 360-degree change occurred. Teacher Mo did not ask us to hand in the paper directly, but asked us to put it in the cabinet and stop talking.

But like my classmates, I didn't control myself and kept exchanging my answers with my classmates. Some students took out the test papers and asked their classmates for answers. Most of the classmates failed to do what the teacher asked. Upon seeing this, Teacher Mo said: "Students who have not been able to perform well, stand up." Only half of the students stood up. Teacher Mo said: "There are still some students who have not stood up." Oh my God! There were also tests on execution ability and test papers. When these two were combined, our class was almost wiped out! Teacher Mo asked the team leader to collect the test papers again.

This math test, coupled with the sudden exam, we have to keep up our efforts! Mathematics Diary Sixth Grade 12

Delicate thinking and skillful purchase of mooncakes

In the long history of mathematics, there have been many mathematical prodigies. That was the example for me to follow. They are like expensive diamonds, shining brightly in the night sky. With my deep love for mathematics and my love to use my brain, love to learn, and love to express. In the end, I became a naughty and cute little star in the starry sky. It is said that the Mid-Autumn Festival is here, and the unique delicacy of the Mid-Autumn Festival-mooncakes has also arrived as promised. There are many flavors of mooncakes, such as egg yolk, lotus paste, beef...it makes me drool just looking at them. Look at me so greedy. My mother immediately gave me a hundred yuan and said with a smile: "Go buy a few cookies and come back to eat."

I came to the store happily with the money. The boss said, "There are big and small mooncakes. The big one weighs 500 grams and the small one weighs 300 grams. The total is 3200 grams. Do you know how many big mooncakes there are and how many small mooncakes there are?" I got the answer right. I’ll sell you ten mooncakes at a 50% discount. As soon as I saw such a good thing, I immediately started thinking about it. After thinking for a while, I organized my thoughts and told the boss: "If they were all large mooncakes, there would be 6.4, but the remaining weight would not be as heavy as one small mooncake. So the large mooncakes are not 6. We can start from a multiple of 5 Think about it, the two numbers 1 and 2 are too small to be considered. The number of multiples of 3 and 5 is too large, so the remaining 1200 are too large. Gram is exactly 4 times of 300 grams, which is 4 small mooncakes.” The boss said with a smile: "Keep your word, 10 moon cakes are 50% off. The original price is 10 yuan each, which is exactly 100 yuan." I immediately said: "Boss, you only need 50 yuan to sell it to me!" The boss happily praised me as "so smart" and sold me 10 large mooncakes for 50 yuan. I happily said thank you and ran home quickly.

There are many secrets hidden in mooncakes! Dear friends, as long as you dare to think and love, you will definitely experience the endless fun in the palace of mathematics and explore a lot of interesting knowledge in the kingdom of mathematics. Mathematics Diary Sixth Grade 13

My math is the best among the three subjects. Every time I take the exam, I get a score of 90 or above, so the math teacher is very confident in me, and I am also very confident. We We have a very good relationship. Whenever I encounter difficulties in mathematics, he will appear in front of me and help me solve the problems. I like him very much and he is also the best teacher to me.

Mathematics is inseparable from everything in life. As long as you are good at observation, you will find that mathematics is inseparable from you. After studying proportion knowledge for six years, I deeply realized that mathematics has brought us many benefits.

It was a sunny afternoon. My brother and I made an appointment to meet in the Forest Park at 2 o'clock, and then go to the zoo to play together. After arriving at the destination, since it was our first time to go to the Forest Park Zoo, we had to buy a map of the park. After I got the map, my brother quietly walked over to me and snatched the map away. I had no choice but to suppress my unreasonable anger towards this "little naughty bag". Then my brother said to me seriously: "Brother, let me as your guide take you to find the lion today!" At this time, I thought to myself: I hope it won't go the other way! After that, my brother led me around like a headless fly. After about an hour, I finally couldn't bear it anymore and shouted: "What are you doing? I'm almost exhausted. Why haven't you arrived yet?" He took the map back and suddenly realized that it was his pushy younger brother who misunderstood the map's scale of 1:5000 as 1 centimeter on the map to represent the actual 5000 centimeters. "Oh, it's so important to learn a skill well! If you are self-righteous like my brother and don't study hard, the consequences will often be self-defeating!" Then, based on the knowledge I learned, after a while, we Came to the lion.

Look at my brother’s envious look. He is even begging me to accept him as my apprentice!

Knowledge is the key to success. Students, study hard! Let us use our own efforts to create a wonderful life tomorrow!

We should not have too much self-blame in our hearts, as long as we work hard! Mathematics Diary Sixth Grade 14

Dongdong, hurry up and do a math test paper! There's an exam tomorrow, and you're not in a hurry. You really don't realize it. "My mother started nagging me again, so I had no choice but to obey her orders and write the test paper obediently.

I picked up the pen and wrote the test paper quickly, but I managed to complete one question in my hand. The pen stopped. The title of this question is this: 3 trucks are going to transport 910 tons of cement to a certain construction site. It is known that the first truck transports 30 tons more than the second truck, and the third truck transports 30 tons more cement than the second truck. Transport 20 tons less. How many tons do each of the three trucks transport? This question is a bit tricky. It is different from the problem-solving strategy questions we have done before. In the past, there were only two numbers. But this time it required three numbers. After thinking about it for a long time, it finally dawned on me that I knew what to do. In fact, the method for doing this kind of question was the same as before, just in a different form. So we started doing it. Because we didn’t know how many tons of cement the first truck transported, we calculated the second truck first and used “910-320=900 (tons)”. The first truck transported 30 more tons than the second truck. tons of cement, so you need to subtract 30 tons. The third truck transports 20 tons less cement than the second truck, so you need to add 20 tons. Calculate the tonnage of cement transported by the second truck if all three trucks are used** * How many tons of cement are transported, and then use "900÷3=300 (tons)" to calculate how many tons of cement the second truck transports. Since the title says that the first truck transports 30 tons more cement than the second truck, the third truck will transport more cement than the second truck. If it transports 20 tons less than the second truck, we can directly use "3030=330 (tons)" to calculate how many tons of cement the first truck transported; use "300-20=280 (tons)" to calculate the third truck How many tons of cement can be transported? In this way, I easily figured out the answer to this question.

Since I solved this question, I have concluded a truth - mathematics is a living thing. Yes, it is changing rapidly. Some new question types are just a change of form or expression for the old question types. Only by following it and using the old methods we have learned to solve new question types can we explore more The mystery of mathematics, continuous progress in the kingdom of mathematics Mathematics Diary Sixth Grade 15

7.7 is 49. Why does it become 7.7 for me? Because we are the first. Seven groups, but we were very miserable. Sun Wukong and Sun Dasheng developed piercing eyes in the alchemy furnace.

However, in two long rope competitions, we were sixth and seventh (the whole class was ranked first. There are eight groups participating, and one group counts as one, which means we have two "good" results (one from second to last, and one from third to last).

Let me talk about this. Let’s have the second long rope competition! During the break of the day, the teacher announced an exciting news: the second group long rope competition was held in the second math class this morning. Three minutes before the competition, The teacher emphasized the rules: there is no time limit for this long rope competition, only the number is counted, and four people must jump in it at the same time before the number can start. Each group can jump three times, and the highest one will be taken. , as your final score in this competition. We each asked the team leader to hold the rope, and then headed to the corridor on the left hand side of Class 5 (5). We thought we could practice for a while when we got there, but the teacher said that we can only dance when we are in our own group. The first group that danced first was worried because their group was not very skilled yet, so they were worried. As a result, their grades were much lower than usual. We were the seventh in our group, and we made others laugh as soon as we came on stage. Because Cao Junhao jumped too fast and stepped on the rope, it was "0" for the first time. Cao Junhao was too slow the second time. The rope hit his feet before jumping, so the second time was "0". The third time, we finally jumped to one, but because Wang Tong was so happy, he shook the rope faster, and the third time was "1". We all hated Wang Tong and Cao Junhao. The eighth group danced very seriously, as if they had been criticized by the teacher. There was no smile on their faces, their faces were ashen, and they finally won the first place.

Did we get seventh place again? This time it was because the whole team was not united, so we must work harder next time. Come on, team members, try to defeat the eighth team and win the championship.