Primary school first grade second volume two-digit addition and substitution video
Here are some possible ways to find the second volume of the two-digit addition and multiplication video: 1. Education Vision Network (sp910.com). This website had a large collection of national quality classes, provincial and municipal quality classes, demonstration classes, public classes, and other famous teachers 'classroom records. It also collected selected classic teaching videos from the Internet. There might be a video of two-digit addition and deduction for the first grade. 2. He could find related teaching video resources by entering "First grade, second volume, two-digit addition and substitution video" into the search engine. Read more exciting novels for free
Elementary school fourth grade second volume mathematics addition and substitution calculation
In the second volume of the fourth grade mathematics addition and substitution calculation, there were some important contents: ** 1. Laws of Operations ** 1. ** Nature of Subtraction ** - Subtracting several numbers from a number in a row was equal to the sum of this number minus these deductions. It was expressed in letters as a - b - c=a-(b + c). For example, when calculating [5.17-1.8 - 3.2], the formula could be converted to [5.17-(1.8 + 3.2)=5.17 - 5 = 0.17]. - In the reverse calculation, a-(b + c)=a - b - c). During this process, one must pay attention to the change of symbols. Many students tend to forget to change symbols during the reverse calculation. - There was also the commutative law of substitution, which was expressed as a (a-b- c= a-c- b). 2. ** Moving with Symbols in Same-Level Operations ** - When there was only addition and substitution in the equation (which belonged to the same level of operation), it could be moved with a sign. For example, when calculating the addition and deduction of an equation, such as <79+187 - 187+21>, you can move <187>> to the front, with the minus sign in front of it,<79>> to the back, with the plus sign in front of it, it becomes <79 - 187+187+21>, which makes it easier to calculate. It was also applicable to the addition and reduction of decimals. For example,"5.82+0.18 - 3.6" could be moved to the back of "5.82" with the plus sign in front, and "3.6" could be moved to the back with the minus sign in front, becoming "5.82+0.18 - 3.6=(5.82 + 0.18)-3.6 = 6 - 3.6 = 2.4". 3. ** Rules for Removing and Adding Brackets ** - When removing or adding parenthesis, if there was a "+" in front of the parenthesis, there was no need to change the sign; if there was a "-" in front of the parenthesis, the sign had to be changed."+" became "-","-" became "+". For example,<9.64-(3.64 + 3)>, after removing the parenthesis, becomes <9.64 - 3.64 - 3=6 - 3 = 3>. ** 2. Error-prone Points in Calculation ** 1. Be careful not to be careless when calculating. Be careful not to count addition as deduction or deduction as addition. 2. Remember to add one when carrying out addition, and remember to abdicate and subtract one when abdicating. ** 3. Calculation of decimals ** 1. He had to pay attention to the alignment of the decimals, and then he had to do the calculation according to the method of addition and substitution of the whole numbers. For example,(20.67-1.48 = 19.19\)，\(18.88 - 16.03=2.85\)，\(15.35 - 9.05 = 6.3),(3.26+20.2 = 23.46),(4.23+1.45 = 5.68),(20.85 - 13.3 = 7.55),(4.21+12.74 = 16.95),(18.62 - 17.01 = 1.61), and so on. 2. The simple operations of decimals were also applicable to the above operational laws, such as the nature of the substitution, moving with symbols, and so on. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Elementary school first grade mathematics volume addition and deduction teaching video
There was a classroom video of " Continuous addition, continuous deduction, and addition and deduction mixing " published by Southwest Normal University on April 13, 2021. The video duration was 39:06. There was also a video about the first year's mathematics unit 3," 1 - 5 addition and substitution." <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflection on the teaching of simple calculation of decimals addition and substitution in the second volume of the fourth grade
The teaching reflection on the simple calculation of decimals addition and substitution is as follows: ** 1. Grasping the teaching content ** 1. ** Teaching starting point based on existing knowledge ** - The simple calculation of decimals was taught on the basis of students learning the addition and substitution of whole numbers, the meaning and nature of decimals, and simple decimals. Teachers needed to accurately grasp this starting point. For example, students had already mastered the laws of integral operations (the commutative law of addition, the combination law of addition, the operational nature of substitution, etc.). This knowledge laid the foundation for the simple calculation of decimal addition and substitution. Students should be guided to migrate the law of integral operation to the operation of decimals. 2. ** Difficulties and Key Points of Knowledge ** - The key point was to let the students understand that the laws of operation for the whole number were also applicable to the operation of decimals. This required the students to observe, calculate, and compare through specific examples. For example, by comparing the results of the two sides of the formula, such as 3.2 + 0.5 and 0.5+3.2, 4.7 + 2.6+7.4 and 4.7+(2.6 + 7.4), the students could intuitively feel that they could also use these operational laws to perform simple calculations. - The difficulty was to let the students explore whether or not decimals could be simplified and how to apply the laws of operation to solve related problems. For example, when it came to the operations of adding and removing parenthesis, such as 5.17 - 1.8 - 3.2, the students had to understand the simple calculation method based on the nature of the operation of the substitution, as well as the change law of the symbols when adding parenthesis (add unchanged, subtract changed). ** II. Teaching Methods and Student Participating ** 1. ** The role of situation creation ** - Creating life situations (such as students buying stationery and other situations) could make students feel that decimals were around them, close the distance between students and new knowledge, and fully mobilize their enthusiasm for learning. Such a situation would help students extract mathematical problems from practical problems in life, then try to solve the problems, exchange learning methods, and summarize the arithmetic of decimal addition and multiplication. 2. ** Students 'independent exploration and participation ** - In teaching, students should be allowed to participate in the process of exploring new knowledge to the greatest extent. For example, when verifying whether the law of integral operations was applicable to decimals, some students could pass the calculation verification, and some students could observe and judge, and then exchange and share. Let the students try, explore, and acquire knowledge. In this process, the students will better understand the simple calculation method of decimal addition and multiplication. Every student will have the opportunity to experience successful learning, train the will to overcome difficulties, and build self-confidence. 3. ** Mistake handling and thought guidance ** - For possible errors in teaching (such as errors in the last bit of the vertical calculation of decimals), if the student did not make such mistakes in the early stages, it was necessary to consider whether to compare the right and wrong according to the default. In the case that the students did everything right, they could discuss the correct calculation method in depth and ask why it was calculated this way. After the students understood the calculation theory, they could strengthen their understanding and mastery of the method through practice such as error diagnosis. This could avoid the interference of error information on the students 'thinking and allow the students to construct knowledge more clearly. ** 3. Practice and Consolidating ** 1. ** Levels of practice questions ** - In order to better consolidate basic knowledge and skills, practice questions needed to be arranged step by step. From the simple calculation exercises of the basic decimals addition and deduction to the exercises that required the flexible application of the law operation and the rules of adding and removing parenthesis, the students 'calculation ability and the ability to use knowledge to solve problems were gradually improved. 2. ** The expansion and extension of knowledge ** - Extending and extending it appropriately in practice, such as simple calculation of decimals addition and deduction, combined with real-life complex shopping scenes or other knowledge in mathematics, would help improve students 'comprehensive mathematical attainment and ability to solve practical problems. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflection on the law of addition after class in the fourth grade of primary school
The following are some of the main points of reflection after the fourth grade addition law class: * * 1. Success ** 1. * * Promotion of learning through interest ** - When reviewing old knowledge, you can use interesting methods, such as password games, which can not only review the commutive law of addition, but also stimulate students 'interest. Using a familiar situation (such as a traveling situation) to introduce the learning of the additivity law could help the students quickly enter the learning state. 2. * * Learning as a substitute for teaching ** - They placed the students 'thinking first and created a platform for students to think and communicate. For example, when teaching the law of additivity, he would guide the students to infer and verify through observation, comparison, and communication. The method of group communication was used to allow students to exchange their computational ideas in groups. This was not only the application of the law of addition, but also an in-depth exploration of knowledge. In this process, the students could discover the characteristics and advantages of the law of additivity. After that, the students were asked to use letters and symbols to represent the law of addition. It was in line with the age of the students, and the students had various forms of representation. It truly realized the concept of returning the classroom to the students. At the same time, the benefits of the law of operation should be properly covered. For example, the simple calculation questions could make the calculation simple and the students could understand its value. * * 2. Inadequacies ** 1. * * Student expression ** - When students used symbols to represent the additivity law, there might be situations where the expression was not clear enough. If he did not emphasize it too much due to time constraints, it might affect the accurate understanding of this concept by some students. 2. * * Remarks on Language ** - The evaluation language was not rich enough, and there was a lack of innovative and motivational evaluation. In the teaching process, positive and creative evaluation language could help stimulate students 'motivation and enthusiasm. If this aspect was lacking, it might make the classroom atmosphere less active. 3. * * Evaluation feedback ** - In the final feedback evaluation process, the time was too rushed and the emphasis on the error-prone areas was not enough. For example, some questions could be deleted to save time and emphasize the error-prone knowledge points. This would better help students master the law of addition. 4. * * In terms of classroom language ** - The classroom language was not standardized and precise enough, which might convey some vague information to the students and affect the teaching effect. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Primary School Food Competition Diary, Third Grade Volume 2
The following is a possible diary of a primary school student's gourmet competition (third grade level, second volume): Food Competition Diary Today, the school held a super interesting food competition. I'm so excited! When they arrived at school in the morning, they could feel the cheerful atmosphere. Everyone brought the ingredients they had prepared, as if they were carrying secret weapons. I'm no exception. I brought fresh fruits and wanted to make a special fruit salad. The competition began, and the students began to make their moves. Some were frying eggs, and the sizzling sound was like a small song. Some were cutting vegetables, and their hands were very skilled. I also quickly started my creation. I carefully cut the fruits into small pieces. There were red apples, curved bananas, and small tomatoes that looked like small lanterns. Then he put them on a beautiful plate and added some sweet salad dressing. I saw my classmate next to me making sandwiches. A layer of bread, a slice of ham, and some green lettuce looked delicious. There was also a classmate who made small biscuits in all kinds of shapes. They were very beautiful. Finally, the teacher will judge our work. When the teacher walked up to me, I was a little nervous. After the teacher tasted my fruit salad, she smiled and nodded. In the end, although I didn't know if I won the award, I found the process particularly interesting. I also tasted the food made by other students. It felt like I was traveling in a small world of food. I'm looking forward to the next food competition! <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Blessing the motherland, lyrics of songs, primary school, fifth grade, volume 1
The lyrics of "Blessing the Motherland" were as follows: Everyone says your flowers are really popular Everyone says your fruit is really rich Everyone says your land is so fertile Everyone says your road is really wide My homeland, my homeland Bless you, my motherland I dedicate my magnificent youth to you May you always be young and happy They say your beliefs won't change Everyone says your flag never fades It's said that you never forget your joys and sorrows They say your singing will never fade My homeland, my homeland Bless you, my motherland I give you my heart May you always be strong and always flourish <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
A recitation of positive and optimistic expressions, primary school sixth grade volume 1
The following is an example of a recitation suitable for the first volume of the sixth grade: Campus Four Seasons Song On the golden campus, we come boisterously, His young mind was filled with endless anticipation. In this world of white, we let loose, Fiery feelings radiated the colors of life. The green campus, those ignorant youths, To show off the brilliance of life and appreciate the infinite knowledge. The hot campus, those young faces, Full of knowledge, looking forward to the new school year. The campus of the four seasons, colorful year after year, In the blink of an eye, we grew up. Thus, with the joy of growing up, we left silently. On a pure and fertile land, our hope for tomorrow is born, We yearn to become strong eagles in the future and soar above the sky. It was you who gave me a good start in life. It was you who aroused my thirst for knowledge, It was you who helped me become a useful person and helped me fly. You taught me to give flowers and leave fragrance in my hand, You have taught me to smile and to be happy. Today, I will bring the most beautiful flowers Today, I will put my sweetest smile To thee, my dearest school, A monument that will never fall in my heart. Children's Day Praise A bright red scarf fluttered in front of her chest. The song of joy plays the movement of hope, The smiling faces were filled with happiness and joy. Children's Day was the happiest day of the year. June 1st was the most romantic season for children. Riding the moon to chase the stars, The journey of dreams began. Learn knowledge and master skills, Today's seedling, tomorrow's pillar, The young heart sowed a beautiful wish. We are eagles with full wings, Tomorrow, I will spread my wings and fly. We are the budding flowers, Tomorrow, the garden would be filled with spring and flowers would bloom. Holding high the flag of the star torch, Let go of the golden dream in his heart. If the youth is strong, then China is strong, The great rejuvenation of the Chinese nation is entrusted to us. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Primary school grade one volume one teaching schedule form
The following is the content of the first volume of the first grade of primary school: ** I. Overall structure and arrangement of teaching materials ** This book has a total of eight units, including one unit for reading, two units for Pinyin, and five units for reading and reading (one unit for reading). Finally, there was the 'Character Reading Table',' Writing Table', and the newly added 'Commonly Used Strokes Name Table'. The teaching materials also included oral communication, after-school exercises, language garden, and other sections. ** II. Teaching schedule of each section ** 1. ** literacy section ** - ** Unit 1 (Reading 1)** - The teaching content included "Heaven, Earth, Man, Metal, Wood, Water, Fire, Earth, Mouth, Eyes, Eyes, Sun, Moon, Water, Fire, and Rhyme Songs" and other texts, as well as oral communication and Chinese Garden. A total of 13 lessons were arranged. The goal was to learn how to perceive the meaning of Chinese characters through pictographs, stimulate interest in literacy, use pictures to recognize 37 Chinese characters, be able to write 11 Chinese characters, and learn how to read through pictures. - ** Other literacy units (the distribution of classes is not clearly listed, but it can be inferred that they are distributed in the corresponding units)** - There were 50 new Chinese characters in the column of "Character Reading" for each class, and 300 Chinese characters were arranged in the "Character Reading Table". The tasks in the literacy unit and the reading text focused on the transition between young and old, reflecting a variety of ways of literacy, such as oral basic literacy. 2. ** Pinyin Unit ** - ** Unit 2 (Hanyu Pinyin 1)** - There were eight classes on Hanyu Pinyin and a Chinese Garden. Learning 6 simple finals and 23 initial syllables. In teaching, we should use the situation map to integrate the learning of Pinyin, cultivate the ability of observation and improve the interest of learning. The goals included learning to pronounce simple syllables and initial syllables, to read accurately, to recognize shapes, to write correctly, to read correctly, to recognize tone symbols, four-line grid, to learn to read correctly with tuning sections, and so on. - ** Another Pinyin unit (no details are mentioned, but the overall Pinyin learning task is similar to the second unit)** 3. ** Read the text ** - There are 14 reading texts in this volume, which are distributed in various units and alternated with the content of literacy and Pinyin. In addition to reading and writing, two questions were usually arranged in the after-class exercises. Reading and reciting the text was an important part. Many texts had reading requirements, and some texts also had reciting requirements. At the same time, there were other exercises such as "I can speak". 4. ** Spoken Communication ** - There were a total of four times. They were "I Say You Do It","Let's Be Friends","How Louder Your Voice Is", and "Bunny Carrying Pumpkins". 5. ** Language Garden ** - Six of the eight units in the book were arranged with "Interesting Reading", which also included "Accumulating over time"(arranging four ancient poems and two aphorisms to learn),"Reading with adults"(selecting a nursery rhyme or fairy tale from each garden),"Words and phrases application"(fixed arrangement for each unit) and other columns. ** 3. Writing teaching schedule (based on the overall situation of the first volume of writing teaching in the first grade)** 1. ** February-March ** - At the same time as the basic stroke training, repeatedly strengthen the students 'correct writing posture and holding the pen posture, and teach the students the method of reading and tracing. 2. ** April ** - The basic strokes and familiar words were combined to help the students understand the basic strokes to form Chinese characters, read the post, and draw red. At the same time, they tried their best to write the basic strokes well and continued to train the correct writing posture. 3. ** May ** - He continued with the focus of teaching in April. 4. ** June ** - The basic strokes and common radical were combined to train the students to gradually develop the ability to independently observe the structure of Chinese characters, read posts, and draw red characters. On the basis of writing correctly, they would gradually develop the habit of consciously maintaining the correct writing posture. At the same time, there would be an evaluation of writing level during the mid-term and the end of the term, using a combination of other people's evaluation and self-evaluation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
Reflection on the teaching of the second volume of mathematics in the fourth grade of primary school
The following are some reflections on the fourth grade mathematics teaching: ** In terms of the first and fourth operations ** - ** Strengths ** - When teaching the order of the four operations, examples could be used to guide the students, such as the scenes of shopping and accounting in life, so that the students could understand the rules of multiplication and division before addition and addition, as well as calculating the parenthesis first. If he could successfully get the students to connect with reality, this would be a very good teaching strategy. - As for the simple arithmetic of the four arithmetic operations, it would be a good idea to guide students to observe the characteristics of numbers and explore them independently, so as to cultivate their sense of numbers and computational ability. - ** Not enough ** - There might be some students who were easily confused about the order of the four mixed operations. This might be due to insufficient practice or the lack of emphasis on confusing points in the teaching. - In the teaching of simple calculations, the explanation of some special number combinations (such as calculations close to the whole ten or hundred) might not be in-depth enough, causing some students to be unable to flexibly use simple calculations. ** 2. Observing objects (2)** - ** Strengths ** - Physical models or animations could be used to show the shapes of objects seen from different directions, which would help students understand intuitively. If such a teaching method was used, it could enhance the teaching effect. - ** Not enough ** - This part was difficult to teach. Some students might have poor spatial imagination and could not accurately identify the shapes of objects seen from different directions. Students with weak spatial imagination might lack sufficient targeted training and guidance methods. ** 3. Laws of Operations ** - ** Strengths ** - If they could explore the laws of addition and multiplication through group cooperation and let the students discover the laws themselves, it could improve their independent learning and cooperation ability. - If he could explain the law of calculation with real life examples (such as different algorithms for calculating the total price when shopping), it would deepen the students 'understanding. - ** Not enough ** - As for the reverse operation of the calculation law, it might not be emphasized enough in the teaching, resulting in some students only using the law to perform simple calculations and not being able to perform reverse operations flexibly. - Some students might just memorize the formulas and did not really understand their meaning, so they were prone to making mistakes in practical application. ** 4. The significance and nature of decimals ** - ** Strengths ** - When explaining the meaning of decimals, one could start with the concept of fraction and use graphs (such as a square divided into 10, 100, etc.) to directly represent decimals. This method of combining numbers and shapes would help students understand. - For the teaching of the property of decimals (adding or removing 0 at the end of the decimals, the size of the decimals remains the same), if a comparison example was used (such as the comparison of 2.3 and 2.30 in terms of numerical values), the students could clearly understand this property. - ** Not enough ** - In the teaching of reading and writing decimals, some students might make mistakes when reading and writing decimals, especially when there were many decimals. This might be the result of not practicing carefully enough. - When teaching the comparison of decimals, some students might not have a deep understanding of some special cases (such as the comparison between 0.9 and 0.900) and have vague concepts. ** 5. Triangle ** - ** Strengths ** - When teaching the classification of a triangle, if the students were to measure the sides and angles of the triangle by themselves, it would enhance their hands-on ability and understanding of the characteristics of the triangle. - For the teaching of a triangle with 180 degrees of internal angles, the method of puzzle experiment (putting the three angles of the triangle together) was used to help students understand this concept intuitively. - ** Not enough ** - In the teaching of the three-sided relationship of a triangle (the sum of any two sides is greater than the third side), some students may only remember this conclusion, but when they actually judge whether the three line segments can form a triangle, they cannot flexibly use this relationship. - When teaching complex triangular combinations, it might be difficult for students to accurately identify the triangular relationship and lack sufficient comprehensive analysis ability. ** 6. Adding and Subtracting Decimals ** - ** Strengths ** - It would be a good teaching method to emphasize the importance of decimal point alignment in teaching and to let students understand arithmetic through examples (such as the addition and substitution of decimals involved in shopping change). - Allowing students to calculate decimals vertically and verify them could cultivate their calculation accuracy and test habits. - ** Not enough ** - There might be some students who made mistakes in the number alignment when calculating the addition and substitution of decimals, especially when the number of digits in the integral part and the decimal part were different. - When solving the practical application of decimals, there might be students who could not correctly analyze the meaning of the question and list the wrong calculations. ** 7. Movement of the graph ** - ** Strengths ** - When teaching the translation and axis-symmetrical graphs, the students could use the grid paper to make the students operate the translation and complete the axis-symmetrical graphs themselves, which could improve their hands-on operation ability and space concept. - ** Not enough ** - For the determination of the distance of the figure translation and the determination of the symmetrical axis of the axis-symmetrical figure, some students might have difficulty understanding it, and there might be a lack of sufficient step-by-step guidance in the teaching. - In the teaching of translation and axis-symmetrical transformation of complex figures (including many basic figures), students might have difficulty accurately grasping the transformation of the overall figure. ** 8. Average and Bar Chart ** - ** Strengths ** - If he explained the meaning and calculation method of the average through specific life data (such as the test results of the students in the class), he could let the students feel the practical value of the average in life. - When teaching bar charts, students could draw their own charts to deepen their understanding of the structure and data representation of the charts. - ** Not enough ** - Some students might misunderstand the concept of the average due to the influence of extreme data. - When comparing different bar charts, students might lack the ability to analyze the information behind the data. ** 9. Mathematics (Chicken and Rabbit in the Same Cage)** - ** Strengths ** - If a variety of solution methods (such as the list method, the hypothesis method, etc.) were used to explain the chicken and rabbit in the same cage problem, it could broaden the students 'solution ideas. - By introducing the topic through the story of the ancient chicken and rabbit cage problem, it could stimulate the students 'interest in learning. - ** Not enough ** - The chicken and rabbit in the same cage problem was more difficult for some students. It might be difficult to understand the solution of the hypothesis method, and the tutoring for these students might not be enough. - Students might lack the ability to draw inferences from one example when they applied the solution to the chicken and rabbit in the same cage problem to other similar problems. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>
350-word essay on the theme of primary school, third grade, second volume
I Love My Primary School My primary school was a place full of energy and joy. As soon as they entered the school gate, they could see the wide field. There were a few tall parasol trees in the corner of the field, guarding the campus like guards. During the break, the students flew out of the classroom like birds and played on the playground. Some were skipping ropes, and the skipping ropes were flying quickly in the air; some were kicking shuttlecock, and the shuttlecock was like an obedient elf jumping on the toes of the students; some were playing hide-and-seek, and laughter echoed throughout the entire playground. The classroom was spacious and bright. Rows of tables and chairs were neatly arranged. The national flag above the blackboard always reminds us to study hard. Although the teacher's podium was not big, it was filled with magic. The teacher was imparting a wealth of knowledge on it. In Chinese class, we followed the teacher to swim in the sea of words; in math class, those wonderful numbers became no longer mysterious under the teacher's explanation; in English class, we felt as if we were in a foreign country and felt a different culture. My primary school, there are respected teachers, dear classmates, and many beautiful memories. I love my primary school. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>