teaching addition stories

Visual aids are very important. They help students see the concept clearly. For example, using number lines or pictures of objects to be added. Another element is repetition. Keep repeating different addition stories so that students get used to the concept.

They can be used to make learning fun. For example, by telling a story about collecting marbles. If a child has 3 marbles and finds 4 more, they can easily understand 3+4 = 7 through the story.

There were some problems with the traditional teaching method in addition table teaching. For example, if the teacher directly showed the sorted addition table and asked the students to find the rules and fill in the missing formulas, the process would be boring and the students would be easily distracted. An improved teaching method was to first ask the students which addition formulas within 20 had been learned, and then let the students think about how to classify the formulas, such as sorting them according to numbers or sorting them according to the type of addition. Then, according to the classification method proposed by the students (such as dividing 9 plus a few into one class, etc.), the teacher made the calculations into cards in advance, stuck magnetic nails on the back and gave them to the students, and asked the students to stick the cards on the blackboard for sorting. In this process, the students could discover the rules of the addition table arrangement on their own and cultivate the ability to explore and discover on their own. Moreover, the students were interested and focused. When looking for the law of slanting, by changing the way of asking questions, such as "find the formula that gets 11", the students could find the law of slanting arrangement in the process of finding the formula, and finally fill in the missing formula in the addition table. In addition, in the teaching of the addition formula within 20, the traditional memorization method started from the first column and read in the conventional way. There were problems that were difficult to memorize, remember, and apply. The new reading method started from the big numbers, such as 9 + 2 = 11, which was read as nine and twenty-one, and some of the pithy formulas were integrated with the multiplication formula. The teaching could be divided into two steps. First, the students would read vertically and use it, and then read horizontally (from right to left). Students who had the ability to learn could learn this reading method, and this reading method would also be helpful for learning to abdicate and subtract within 20 in the next semester. At the same time, in the teaching process, attention should also be paid to the classroom organization, to pay attention to students 'independent learning and the opening of the classroom, to pay attention to students' learning, to avoid simple knowledge instilling, to ensure that the teaching focus is highlighted, such as the addition and substitution table rules in the review class within 20 (the numbers behind the minus sign are the same when looking vertically, the numbers in front of the minus sign are the same when looking horizontally, and the numbers are the same when looking diagonally). <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

There were some shortcomings in the teaching of addition and substitution: 1. ** Review Lead-in Stage **: The number of mental arithmetic questions may be small, and some students may not be able to participate fully, resulting in distraction. For some key knowledge, such as finding the least common multiple, if they did not review it enough before class, it might affect the speed of subsequent calculations. 2. ** Student Exploration Stage **: Not enough attention is paid to students with learning difficulties. They often put their energy on students who are good at expressing themselves or whose grades are above average, thus ignoring the learning needs of individual students with learning difficulties. 3. [In-class training segment: The effect is not good when students are used.] Although the average students could solve the questions, the form was not standardized. The students with learning difficulties had difficulty solving the questions, while the top students had nothing to do, resulting in a waste of classroom time and unable to meet the learning needs of students at different levels. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The reflection on the teaching of addition and substitution could be written from the following aspects: ** I. Achievement of teaching objectives ** 1. ** Knowledge and Skills ** - Whether the student can accurately understand the concepts of the commutative law of addition, the association law, or the addition and substitution of scores. For example, in addition, whether the student understood the position and invariable of the addend (the commutative law of addition), and whether the student had mastered the calculation skills such as general fraction in fraction addition and substitution. They could review the class questions, homework, and test results to see how well the students had mastered the rules of addition and multiplication. - Can the student apply the knowledge of addition and substitution to practical calculation problems, including simple addition and deduction of numbers, decimals, or scores, as well as some comprehensive mathematical problems? 2. ** In terms of process and method ** - Observe the development of the students 'thinking process in the process of learning addition and deduction. For example, when exploring the law of addition, whether the students could obtain the law through observation, comparison, induction, etc.; in the teaching of fraction addition and substitution, whether the students could use transformation ideas (such as transforming different decimal points into the same decimal points) to solve the problem. - To evaluate whether the teaching methods used in the teaching process will help the students master addition and multiplication. For example, whether group cooperative learning promoted the communication between students and their understanding of knowledge, and whether multi-media teaching resources helped students better understand abstract computing concepts. 3. ** Emotions, attitudes, and values ** - To assess the students 'interest and participation in the process of learning addition and multiplication. For example, whether the introduction of interesting mathematical situations stimulated the students 'curiosity about addition and substitution, whether the classroom interaction was positive, and so on. - Pay attention to the students 'attitudes when faced with difficulties in addition and multiplication, whether they actively try to solve the problem or give up easily, and the emotional experience such as the sense of accomplishment after solving the calculation problem. ** 2. Teaching content ** 1. ** Selection and organization of content ** - Check if the difficulty level of the teaching content is suitable for the student's learning level. If the teaching content was too simple, the students would feel that it was not challenging enough, and if it was too complicated, it might cause the students to feel frustrated. For example, in the teaching of addition and substitution of different decimators, whether the teaching content of general fraction was reasonably explained and expanded according to the students 'existing knowledge base. - Is the teaching content organized? For example, the students would be taught from simple to complex (such as adding and deducting whole numbers first, then decimals, and adding and deducting fraction), and whether the transition between the various knowledge points was natural or not, and whether it would help the students build a complete knowledge system of addition and substitution. 2. ** Depth and breadth of content ** - He thought about whether he had dug deep into the key content (such as law calculation, arithmetic, etc.) in the addition and substitution operation teaching. For example, in the teaching of the law of additivity, whether to let the students fully understand why the first two numbers were added first or the last two numbers were added first when adding three numbers, and the intrinsic reason why the sum did not change. - At the same time, he also had to consider the breadth of the teaching content and whether it expanded the connection between addition and deduction and real life or other subjects. For example, through the price calculation in the shopping scene to reflect the widespread application of addition and substitution in life, or the addition and substitution operations involved in scientific experiment data processing. ** 3. Teaching methods and strategies ** 1. ** The effectiveness of teaching methods ** - This paper analyzed the effects of teaching methods such as lecture method, demonstration method, and inquiry method in addition and substitution teaching. For example, when explaining the vertical calculation of integral addition, whether the teaching method clearly conveyed the calculation steps and carry rules; in the addition and substitution of scores, whether the demonstration method (such as using graphs to represent scores) helped students understand the calculation theory. - Does the inquiry method give students enough space to learn independently? For example, when exploring the law of addition, should the students be guided to discover the law on their own instead of directly telling the result? 2. ** The rationality of teaching strategies ** - Whether or not a variety of teaching strategies are used to meet the needs of students with different learning styles. For example, for visual students, whether they used teaching resources such as graphs and charts, and for kinaesthetic students, whether they arranged some practical activities (such as using a stick to perform addition and multiplication). - Consider the role of teaching strategies in classroom management. For example, whether the grouping strategy of group cooperative learning was reasonable, whether it could avoid the phenomenon of individual students "free riding", and at the same time promote cooperative learning between students. ** 4. Student performance and individual differences ** 1. ** Overall student performance ** - It summarized the overall performance of the students in the addition and substitution class, including class participation, homework completion, test results, and so on. For example, whether most students answered questions actively in class, how accurate their homework was, and the distribution of scores in the addition and substitution section of the exam. 2. ** Coping with Individual Disparities ** - To analyze how to treat the individual differences of students in the teaching process. For students with strong learning ability, whether they were provided with expansive learning tasks, such as guiding them to explore more applications of the law of operation in simple calculations after mastering the basic addition and deduction operations; for students with learning difficulties, whether they were given enough attention and guidance, such as whether they were given individual guidance and intensive exercises for students who were easy to make mistakes in the calculation of decimals. ** 5. Problems in the teaching process and improvement measures ** 1. ** Problems ** - Find out the specific problems in the teaching process. For example, the teaching schedule was unreasonable, resulting in some important content being explained in a hurry; or the teaching resources were not fully utilized, such as the animation demonstration in the multi-media class did not play a very good role in assisting teaching. - The reason for the problem could be that the teaching design was not perfect enough, the students 'learning situation was not estimated enough, or the teacher's own teaching ability needed to be improved. 2. ** Modification measures ** - According to the existing problems, specific improvement measures were proposed. If it was a problem of teaching time arrangement, he could re-plan the teaching process and reasonably allocate the time of each teaching link. If it was a problem of the use of teaching resources, he could re-select or produce more effective teaching resources, such as making more intuitive teaching animations of score addition and deduction. - He thought about how to prevent similar problems from happening again in future teaching, such as strengthening the rehearsal and evaluation of teaching design to continuously improve his teaching ability. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following are a few aspects that may be involved in the reflection of addition and substitution teaching: ** 1. Teaching methods ** 1. ** Diverse algorithms and independent exploration ** - It was important to give the initiative to the students when teaching addition and substitution of numbers within ten thousand, so that they could explore the calculation method independently with the help of their existing knowledge and experience. For example, for mental arithmetic and vertical calculation, don't design overly guiding questions to avoid bringing students into the default method. Let the students do the math by themselves and share the results in the group so that they can experience the success of independent learning. - In the teaching of vertical calculation, students were also allowed to try it out on their own, and then they could exchange and demonstrate. This method could effectively expand the students 'thinking and promote the exchange of algorithms. 2. ** Situation Creation and Question Guidance ** - Creating a suitable situation was very helpful to teaching. For example, the introduction of addition teaching from the pictures of the World Exposition could arouse the enthusiasm of students to learn. At the same time, it allowed students to find mathematical information in the situation and experience the connection between addition and life. - In the process of teaching, the social practice situations such as the different ticket prices of different means of transportation were used to let students experience the significance of deduction in comparison and feel the connection between deduction and life. Moreover, it allowed students to discover, raise, and solve problems independently in specific situations, experience independent thinking, take the initiative to explore, report and communicate, and so on. Finally, the teacher would focus on introducing a main method that would help students form a representation and experience mathematical ideas. - However, there might be problems in the creation of situations, such as the data processing in some situations that might make students confused. For example, in a teaching situation where 500 bottles were given once, 520 bottles were given in the first two weeks, and the remaining 20 bottles were ignored in the teaching. This may cause students to have doubts and need to better deal with the data logic in this situation. 3. ** Estimated Teaching ** - The cultivation of estimation ability was part of the teaching. However, there were some puzzles in the teaching. For example, the format of the estimation formula was not clear. It was not known whether the students should directly write the approximate calculation result (such as 190 + 220 = 410) or use the half-text and half-algorithm format (such as 192+219 is approximately equal to 190+220 = 410). - Students had a biased understanding of estimation, and there was a situation where they estimated for the sake of estimation. Some students would first calculate the accurate answer and then find an approximate number as an estimate, and most students would not use the estimation method to test the rationality of the calculation results. ** 2. Student learning ** 1. ** Cultivation of computing ability ** - In the cultivation of computing ability, one must pay attention to correct, flexible, reasonable, and concise operations. For example, in the process of solving problems, students should be allowed to choose the calculation method flexibly according to the actual situation. For example, in the situation where estimation and precise calculation were needed, students should improve their computing ability. - In teaching, open questions were designed to allow students to solve the problem in different ways (multiple solutions for one question). In the observation and comparison of different methods, they chose a reasonable and concise calculation path. - However, there might be insufficient practice in actual teaching, resulting in students not being able to consolidate their knowledge well and affecting the improvement of their computing ability. 2. ** Attention to Individual Students ** - In the teaching process, the individual differences of the students should be fully taken into account, including their acceptance ability and psychological characteristics. For example, in the teaching of multiplication (such as 300 - 116) where there are zeros in the middle of the minuend, it may be because the students do not have a good grasp of the learning situation, and the situation of individual students listening to the class and mastering the knowledge is not ideal. When students explore the calculation process (such as demonstration 300 - 116), the teacher should give enough time for the students to think. They should not be in a hurry to explain. They should face all the students and let the students inspire each other to find a solution to the problem. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following is a reflection on the addition and deduction of the second root: ** 1. Students 'Knowledge Mastery ** 1. ** Simple Problem ** - Students had difficulty in decomposing the radical. For example, a number like 32 could not be decomposed into 16 by 2 at once, but into 4 by 8. It could not be decomposed completely. He also couldn't completely understand the decomposition of the numbers 108 and 98. This reflected that the students were not familiar with the decomposition of numbers, which was crucial for the reduction of the second root. - When the square root was a fraction, the student's grasp was even worse. For example, when the numerator of the root was 8 or 27, many students directly multiplied it by 8 or 27, resulting in a large amount of calculation and easy to make mistakes. In fact, multiplying by 2 or 3 could simplify it. This meant that the students did not understand the simplest method of rational multiplication of the square root. 2. ** Combining the same kind of square root problems ** - When combining the same kind of square root, the students made more mistakes when combining the coefficient, especially when the coefficient was a score. This reflected the students 'lack of knowledge in the calculation of scores and similar terms. The teacher needed to explain more and explain in detail when explaining the step of combining the same kind of square roots. ** 2. Teaching strategy ** 1. ** Practice and Test ** - From the perspective of teaching effectiveness, it required more teaching, more practice, and more testing. Currently, only one-third of the students were correct after the test. Under normal circumstances, two-thirds of the students should be correct. If time allowed, they could create a second root topic exam with about 20 questions. They would conduct a second exam for the questions that made a lot of mistakes. They would make up for the mistakes made by the students after the second exam to promote the students 'proficiency in the algorithm. 2. ** Teaching methods ** - In the teaching process, we should pay attention to the application of analogy, such as analogy of similar terms, combination of similar terms, and integral addition and deduction to guide students to understand the definition of similar square roots and the rules of square root addition and deduction. This will allow students to naturally migrate to new knowledge on the basis of existing knowledge, establish the connection between old and new knowledge, and form a mathematical knowledge system. At the same time, by creating a living situation or designing a series of questions as a teaching situation, it can stimulate students 'interest in learning and thirst for knowledge, and improve the effectiveness of classroom teaching. 3. ** Pay attention to the individual aspects of students ** - In the classroom, they should always pay attention to the students 'psychology and students with learning difficulties, and give students appropriate encouragement, enlightenment, and evaluation. For example, when a student made a mistake, such as writing on the blackboard, they had to find other students to provide help in time and guide the students to reflect on the reasons for the mistake. In group studies, students should be encouraged to cooperate and explore independently, so that students can exchange their own opinions and put forward their own opinions for everyone to comment. Teachers should go deep into the group to collect information, guide learning, and give full play to the students 'main role. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following is an example of a two-digit addition: ** 1. Teaching objectives ** 1. Let the students understand and master the method of two-digit addition. 2. Through practice, the students could improve their calculation speed and accuracy. 3. Cultivate students 'mathematical thinking and logical reasoning ability. ** 2. Important and Difficult Points in Teaching ** 1. ** Main point ** - Master the method of decomposing numbers, calculating separately, and then adding them in two-digit addition. - Understand the principle of carry and be able to handle carry situations correctly. 2. ** Difficulty ** - Able to flexibly use fast calculation methods for different types of two-digit addition (such as carry and non-carry). - It allowed students to understand the mathematical principles behind the quick calculation method, not just the mechanical memory. ** 3. Teaching process ** 1. ** import ** - He began with simple one-digit addition exercises, such as 3 + 5, 4+7, etc., and then led to the topic of two-digit addition. Ask the students about their understanding of the conventional calculation method of two-digit addition, and then introduce the quick calculation method. 2. ** New Grant ** - Explain the quick calculation method of two-digit addition: decompose the two addenda into ten digits and one digit respectively. First, calculate the addition of the ten digits, then calculate the addition of the one digit, and finally add the two results, paying attention to the carry. For example, 28+31, 20 + 30 = 50, then 8+1 = 9, and finally 50+9 = 59. - The demonstration was done through multiple examples, such as 75+24, 56 + 29, etc., while emphasizing the calculation steps and the processing of carry. 3. ** Practice * - He gave the students some two-digit addition exercises and asked them to complete them independently in class. The practice questions could include different types of two-digit addition, with or without carry. - The teachers would patrol and find problems in the calculation process in time and give guidance. 4. ** Summing Up ** - Please share your experience and problems in doing the exercises. - The teacher summarized the key points of the two-digit addition method and emphasized the importance of carry again. ** 4. Reflection on Teaching ** 1. ** Strengths ** - ** Increase calculation efficiency **: This quick calculation method helps students to quickly calculate two-digit addition. It increases the calculation speed to a certain extent and is very helpful for the calculation part of mathematics learning. - ** Cultivate mathematical thinking **: By decomposing numbers and calculating separately, students can think about addition operations from different angles, cultivating their mathematical thinking ability and logical reasoning ability. - ** Intuitional and easy to understand **: The method is relatively intuitive and easy for students to understand. Especially through the demonstration of multiple examples, students can quickly grasp the calculation steps. 2. ** Flaws ** - ** Limited scope of application **: This quick calculation method is mainly suitable for two-digit addition. For multi-digit addition or decimal-digit addition, it needs to be further expanded or cannot be directly applied. - ** Confusion possible **: Some students with weaker comprehension ability may be confused in decomposing numbers, calculating separately, and carrying, resulting in calculation errors. - ** Lacking deep understanding **: Some students may just mechanically follow the steps and do not really understand why they need to calculate in this way. Their understanding of mathematical principles is not deep enough. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

The following is a summary and reflection on the teaching of addition and substitution: ** I. Teaching summary ** 1. ** Achievement of teaching objectives ** - Knowledge and Skills: Clearly describe the student's knowledge of addition and substitution (such as addition and substitution of whole numbers, fraction addition and substitution, or decimals addition and substitution, etc., depending on the actual teaching content). For example, whether he could accurately calculate all kinds of addition and substitution formulas, whether he could skillfully use the addition and substitution operation law (if it was involved) to perform simple calculations, and so on. - Method and process: summarize the process of thinking, inquiry, reasoning, etc. that students have experienced in the process of learning addition and deduction. For example, in the teaching of addition and substitution of different decimators, whether the students could transform the problem into the knowledge they had learned to solve it through general fraction and other methods, and whether they understood the calculation theory behind the operation. - Emotional attitudes and values: measure the students 'interest in learning addition and deduction, self-confidence, and other changes in emotional attitudes. For example, whether they were passionate about learning mathematical operations, whether they dared to try to solve addition and substitution problems, and so on. 2. ** Teaching content analysis ** - Key content: emphasize the key parts of addition and substitution teaching, such as the application of the commutative law of addition, the combination law in the addition of whole numbers, or the processing of the numerator in the addition and substitution of scores. Analysis of the processing methods of these key contents in the whole teaching process and the students 'mastery. - Difficulty Breakthrough: For the difficult points in addition and substitution teaching, such as the understanding of the calculation theory in addition and substitution of different decimators (the different decimators need to be converted into the same decimators), the problem of digit alignment in addition and substitution of decimals, etc., explain the teaching methods used to break through these difficulties, as well as the students 'performance after breaking through the difficulties. 3. ** Teaching Method Usage ** - The effectiveness of teaching methods: evaluate the teaching methods used in addition and substitution teaching, such as lecture method, demonstration method, inquiry method, etc. For example, when teaching the law of integral addition, whether it would help students understand the law of addition through specific life examples (such as shopping and accounting); in the process of exploring the addition and substitution of scores, whether the group cooperation method stimulated the students 'learning enthusiasm and improved their computing ability. - The innovation of teaching methods: If some innovative teaching methods are used in the teaching process, such as the use of mathematical games, multi-media resources, etc. to teach addition and multiplication, the effect of these methods on the improvement of the teaching effect should be described. ** 2. Reflection on Teaching ** 1. ** Reflection on the students 'learning situation ** - Individual differences: Think about the differences in the performance of different students in addition and deduction. For example, for students with strong learning ability, whether the teaching content is challenging enough, and for students with learning difficulties, which aspects are not given enough support? For example, in the teaching of decimals addition and substitution, some students may often make mistakes in dealing with decimals. Is there enough guidance for this situation? - Learning feedback: analyze the feedback from students in class exercises, homework, tests, and other aspects. If a student had a high error rate in a certain type of addition and substitution operation (such as the fraction operation in fraction addition and substitution), he would reflect on whether it was caused by unclear teaching content or insufficient practice. 2. ** Reflection on the teaching process ** - Teaching segment design: review the various segments of addition and substitution teaching, such as introduction, new teaching, practice, summary, etc. For example, whether the introduction phase could effectively attract students 'attention and stimulate their interest in addition and substitution learning; whether the knowledge points in the new teaching phase were clear and orderly; whether the questions in the practice phase were targeted and hierarchical, and whether they could meet the needs of students at different levels; whether the summary phase could help students sort out the knowledge system of addition and substitution. - Time allocation: Consider whether the time allocation for each teaching content in addition and substitution is reasonable. For example, did he spend too much time teaching the addition law, resulting in insufficient practice time for the subsequent deduction? 3. ** Reflection on Teaching Resources ** - Use of teaching materials: Reflect on whether the use of teaching materials is sufficient and reasonable. For example, whether the examples and exercises in the teaching materials were effectively used, and whether the content of the teaching materials was supplemented or adjusted according to the actual teaching situation. - Extra-cursory resources: If extra-cursory resources are used in addition and substitution teaching, such as mathematics extra-cursory reading materials, online mathematics course resources, etc., you should reflect on the effect of the use of these resources and whether it helps to improve the students 'addition and substitution ability. 4. ** Modification measures ** - According to the above reflection, specific improvement measures were proposed. For example, if it was found that students had difficulty understanding arithmetic in addition and substitution of different decimators, more visual demonstration could be added, such as using graphics (auxiliary tools such as ten-grid matrix) to help students understand. If the time allocation of teaching was unreasonable, the time arrangement of each link should be re-planned. If there was insufficient support for students with learning difficulties, individual tutoring plans could be formulated. When writing the summary and reflection of the addition and substitution operation teaching, it is necessary to analyze all aspects of the teaching process in a comprehensive and objective manner in order to continuously improve the teaching quality and help students better master the knowledge of addition and substitution operation. <a href="/?from=ask_words" style="color:red" target="_blank">Read more exciting novels for free</a>

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>