Law of force
Publish: 2021-04-15 05:25:09
1. 1、 Basic training:
from the psychological characteristics of different ages of primary school students, the basic requirements of oral arithmetic are different. Low and middle grade students mainly add one or two digits. It is better for senior students to take the one digit by two digit mental arithmetic as the basic training. The specific requirement of oral arithmetic is to multiply the number of one digit and the number of ten digits of two digits, and then add the proct of multiplying the number of one digit and the number of one digit of two digits to the three digits, and quickly say the result. In primary school, this training is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of thinking and intelligence
Second, targeted training: the main form of the number of senior primary school students has changed from integer to score. In the operation of numbers, the addition of different denominators is the most time-consuming and error prone place for students, and it is also the key and difficult point of teaching and learning
two fractions, the large number in the denominator is the multiple of the decimal. For example, "1 / 12 + 1 / 3", in this case, oral calculation is relatively easy, the method is: the big denominator is the common denominator of two denominators, as long as the small denominator is expanded by multiple until it is the same as the big number, and the denominator is expanded by several times until it is the multiple of another denominator decimal< Third, memory training
the content of senior calculation is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. Some of these operations have no specific rules of oral arithmetic and must be solved by strengthening memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and the proct with several common numbers 12, 15, 16 and 25
3. The denominator is the decimal value of the simplest fraction of 2, 4, 5, 8, 10, 16, 20 and 25, that is, the interaction of these fractions and decimals.
from the psychological characteristics of different ages of primary school students, the basic requirements of oral arithmetic are different. Low and middle grade students mainly add one or two digits. It is better for senior students to take the one digit by two digit mental arithmetic as the basic training. The specific requirement of oral arithmetic is to multiply the number of one digit and the number of ten digits of two digits, and then add the proct of multiplying the number of one digit and the number of one digit of two digits to the three digits, and quickly say the result. In primary school, this training is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of thinking and intelligence
Second, targeted training: the main form of the number of senior primary school students has changed from integer to score. In the operation of numbers, the addition of different denominators is the most time-consuming and error prone place for students, and it is also the key and difficult point of teaching and learning
two fractions, the large number in the denominator is the multiple of the decimal. For example, "1 / 12 + 1 / 3", in this case, oral calculation is relatively easy, the method is: the big denominator is the common denominator of two denominators, as long as the small denominator is expanded by multiple until it is the same as the big number, and the denominator is expanded by several times until it is the multiple of another denominator decimal< Third, memory training
the content of senior calculation is extensive, comprehensive and comprehensive. Some common operations are often encountered in real life. Some of these operations have no specific rules of oral arithmetic and must be solved by strengthening memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and the proct with several common numbers 12, 15, 16 and 25
3. The denominator is the decimal value of the simplest fraction of 2, 4, 5, 8, 10, 16, 20 and 25, that is, the interaction of these fractions and decimals.
2. Anshun's 2011 "ten livelihood projects" have been released recently. The projects involve ten categories, including environmental improvement, employment promotion, poverty alleviation, ecation, social security, health care, people's livelihood, infrastructure, culture and sports, and social management. In 2011, Anshun will establish and improve the relevant security system, promote the implementation of the "livelihood project" with high standards, high quality and high efficiency, and strive to become a model "project" in the whole province<
● poverty alleviation
helping 36000 people out of poverty
recing 36000 people in the whole year. The annual per capita net income of farmers in four key poverty alleviation and development counties increased by more than 10%. The poverty alleviation project of mountain agriculture was carried out in depth, and the pilot project of "one instry oriented, multi proct symbiosis, short-term cultivation and long-term cultivation combined" was carried out in four key poverty alleviation counties. We will implement the "three one poverty alleviation cell project" with the main content of "one poor farmer transfers one person, one mu of economic forest (Garden) per capita, and one family grasps one way to increase the income of secondary and tertiary instries and become rich". We will expand employment channels for the masses in poverty alleviation areas, train and transfer 800 people, and transfer 10000 people to other instries. Actively develop rural tourism, and carry out rural tourism pilot in four poor villages. We will continue to do a good job in the poverty alleviation work of Party building in the four key counties, do a good job in the activity of "pairing ten thousand branches and helping ten thousand party members", and complete the rotation training task of Party organization secretaries in 400 first-class poor villages<
● employment promotion
15000 new jobs were created
more than 15900 new jobs were created in cities and towns, 4700 unemployed people with certificates were re employed, 2300 people with employment difficulties were re employed, and the registered unemployment rate was controlled within 4.5%. 180-200 college graates were recruited to work in the village, and no less than 50 college graates were recruited to work in supporting medicine, agriculture, ecation and poverty alleviation. About 150 college graates were recruited to participate in the employment internship; No less than 20% of college graates who have registered for unemployment are employed; By using "Saturday" job fairs, special job fairs, public welfare job fairs, etc., all enterprises in the city are organized to actively provide jobs, strive to achieve 1500 jobs, and recommend college graates to achieve 8000 employment. More than one employment and internship base will be established, and 40000 rural labor will be transferred for employment. Organize "SIYB" entrepreneurship training for no less than 5 periods, and train 300 small bosses; 160 small business owners will be added in the city, 2000 new jobs will be created, and the policy system to create a provincial entrepreneurial city will be launched; We should actively create provincial demonstration counties for rural labor transfer and employment; The coverage rate of human resources and social security platform construction in the streets and towns of the city has reached more than 85%, and more than two fully employed communities have been created< In 2011, Anshun City will further carry out etiquette learning activities for millions of citizens. More than 11000 secondary vocational school students have been recruited, 5000 skilled talents have been trained for the society, and more than 15000 labor force have been trained; Alt higher ecation has enrolled more than 2300 students; The gross enrollment rate of senior high school ecation is 46%, and that of higher ecation is 17%. In order to improve the quality of science and technology, vocational skills and business ability as the core, large-scale rural practical technology training. We will promote the construction of provincial key demonstration secondary vocational schools in Anshun vocational secondary schools<
● social security
realize the full coverage of urban and rural social assistance system
the number of basic endowment insurance participants has reached 125152, basically solving the problems left over by the history of pension security for uninsured family members and temporary workers. The number of urban basic medical insurance participants reached 376419. We will improve the minimum living security system for urban and rural residents and achieve full coverage of the urban and rural social assistance system. Urban and rural minimum living security should be guaranteed as much as possible and guaranteed according to the standard under dynamic management. We should improve the social security system for land expropriated farmers and realize the connection with the new rural endowment insurance pilot and the basic endowment insurance system for urban workers as soon as possible. The measures for the qualification of urban low-income families were issued, the temporary relief system and urban and rural medical relief system were standardized and improved, and the temporary relief funds, rural five guarantees funds and rural five guarantees construction funds were included in the local financial budgets at all levels, which were increased year on year. The number of unemployment, work-related injury and maternity insurance insured reached 68305, 82841 and 101475 respectively
the municipal funeral service center was built and put into use, and the crematorium and cemetery projects were started. The construction of Anshun urban public transport hub terminal was started<
● people live in peace
realize the dream of low-income families' "Snail House"
9803 sets of low rent housing, 1309 sets of affordable housing, 380 sets of public rental housing, 40 sets of price limited commercial housing, 300 sets of urban shantytowns, 400 sets of state-owned instrial and mining shantytowns and 327 sets of forest shantytowns are newly constructed. Basically solve the housing problem of urban low-income families whose per capita housing construction area is less than 15 square meters in Anshun. All construction contents of the "6.28" post disaster reconstruction, relocation and resettlement project in Gangwu Town, Guanling Autonomous County were completed, and 655 people from 149 households were resettled to ensure the smooth resettlement of the victims. Do a good job in the relocation of rural houses and schools threatened by geological disasters
start the construction of Wudang road and Beishan Road, start the construction of two pedestrian overpasses in the central urban area, complete the "white to black" road project in the main street of Xixiu District, and do a good job in the construction of sewage collection pipe network project and domestic waste collection and transportation system project in the central urban area. The first phase construction of the new campus of Anshun No.2 Middle School was completed. We should do a good job in the reconstruction of the streets and alleys in the central urban area<
● infrastructure
solve the problem of safe drinking water for 150000 people
invest 250 million yuan to complete 65.5 kilometers of national and provincial trunk lines. The implementation of township (town) smooth engineering and other rural highway construction projects. To solve the problem of safe drinking water for 150000 people, we have completed 27 dangerous reservoirs, 100 square kilometers of soil erosion control area, 34000 mu of "water and tobacco supporting" project construction task, implemented two small and medium-sized river control projects, and ensured the completion of two "Ziqian" projects of rape River Reservoir and Ziyun Luga reservoir in Xixiu District. The construction of rural power grid was improved, and 186.86 million yuan was invested in the construction and transformation of rural power grid. The complete transformation rate of administrative village power grid was 100%, the power supply reliability rate of rural power grid was 98.6%, and the comprehensive line loss rate of rural power grid was reced to 12%. More than 167.98 million yuan has been invested in upgrading the urban power grid, 30 new township (town) radio and television service stations have been built, the cable television network of 40 towns has been transformed and digitized as a whole, 651km optical communication cables have been built in rural areas, 480 mobile communication base stations have been built, 80 administrative villages have been added to realize optical fiber access, and 30 natural villages have been added to connect telephone<
● environmental improvement
landscape renovation along Shanghai Kunming highway was completed
focusing on expressways, high-speed railways, main trunk roads, scenic spots, instrial parks, main reservoir areas and historical and cultural towns, rural living environment improvement projects were carried out in a series. In the first half of 2011, we completed the preparation, evaluation and approval of all pilot village construction (renovation) plans, and achieved initial results this year. By the end of October 2011, the renovation of architectural landscape along Anshun of Shanghai Kunming expressway will be completed. We should do a good job in the implementation plan and project planning of the pilot project of "one case, one discussion" financial awards and subsidies for village level public welfare undertakings in 2011, actively apply to the province, and strive for Guanling Autonomous County (including Baishui town) and Ziyun Autonomous County to enter the pilot scope of the whole province
● culture and sports
build a number of public welfare cultural and sports venues
build 50 farmers' cultural homes and 508 farmers' Book houses. Complete the maintenance and construction of two County Libraries (cultural centers); Complete the equipment configuration of 20 Township comprehensive cultural stations, and equip 2 community cultural centers and 2 community cultural activity rooms; Complete 20 cultural information resource sharing projects of township (town), community primary service point equipment. Ten village level farmers' sports fitness projects, two township level farmers' sports fitness projects, 12 community fitness path projects, one county-level Stadium "snow charcoal project" have been built, and the construction of municipal National Fitness Center (athletes' apartment) and Municipal Cultural Center (power plant workers' Club) have been started. 22044 rural public welfare films were screened. More than 60 performances of "three cultural trips to the countryside" were organized<
● medical and health
the relocation project of Anshun people's hospital was started
the per capita basic public health service fund reached 20 yuan. Consolidate and improve the new rural cooperative medical system, implement the government subsidy standard of 120 yuan per person per year, and the participation rate is stable at more than 95%. Five Township family planning service stations were newly built or expanded, and 80 village family planning service rooms were newly built or expanded. We should do a good job in the prevention and control of infectious diseases and maternal and child health care, control the outbreak of infectious diseases, and rece maternal and infant mortality. One tertiary hospital in our city and two tertiary hospitals in Zhejiang Province were organized to support five county-level hospitals in our city. We should implement the national essential drug system in primary medical and health institutions run by the government, equip and use essential drugs, and implement zero margin sales. We started the relocation project of the Municipal People's Hospital, started the standardization construction project of Xixiu District and Pingba County hospitals, and completed the standardization construction project of Puding and Ziyun county hospitals<
● social management
ten thousand monitoring points monitor the urban area
basically complete the construction of the city's urban alarm and monitoring system ("Skynet project"), and speed up the construction of the second phase of the urban alarm and monitoring system, with 10000 front-end monitoring points, 1000 alarm points, and the city's central area, main roads, key and critical parts of the case The main entrances and exits of the campus and key areas are all equipped with video monitoring probes, and the monitoring and alarm network sharing with provincial, municipal and county public security organs should be realized. Schools at all levels and of all types shall be equipped with full-time security personnel according to the proportion of 2 to 3 students below 500, 3 to 5 students between 500 and 1000, and no less than 3 ‰ of the total number of students above 1000
complete the construction of rescue and Protection Center for street children and children's welfare home. We should strengthen the management of the floating population, establish a comprehensive information system for the service and management of the floating population, and graally promote the "one card" management methods such as residence permit and social security card.
● poverty alleviation
helping 36000 people out of poverty
recing 36000 people in the whole year. The annual per capita net income of farmers in four key poverty alleviation and development counties increased by more than 10%. The poverty alleviation project of mountain agriculture was carried out in depth, and the pilot project of "one instry oriented, multi proct symbiosis, short-term cultivation and long-term cultivation combined" was carried out in four key poverty alleviation counties. We will implement the "three one poverty alleviation cell project" with the main content of "one poor farmer transfers one person, one mu of economic forest (Garden) per capita, and one family grasps one way to increase the income of secondary and tertiary instries and become rich". We will expand employment channels for the masses in poverty alleviation areas, train and transfer 800 people, and transfer 10000 people to other instries. Actively develop rural tourism, and carry out rural tourism pilot in four poor villages. We will continue to do a good job in the poverty alleviation work of Party building in the four key counties, do a good job in the activity of "pairing ten thousand branches and helping ten thousand party members", and complete the rotation training task of Party organization secretaries in 400 first-class poor villages<
● employment promotion
15000 new jobs were created
more than 15900 new jobs were created in cities and towns, 4700 unemployed people with certificates were re employed, 2300 people with employment difficulties were re employed, and the registered unemployment rate was controlled within 4.5%. 180-200 college graates were recruited to work in the village, and no less than 50 college graates were recruited to work in supporting medicine, agriculture, ecation and poverty alleviation. About 150 college graates were recruited to participate in the employment internship; No less than 20% of college graates who have registered for unemployment are employed; By using "Saturday" job fairs, special job fairs, public welfare job fairs, etc., all enterprises in the city are organized to actively provide jobs, strive to achieve 1500 jobs, and recommend college graates to achieve 8000 employment. More than one employment and internship base will be established, and 40000 rural labor will be transferred for employment. Organize "SIYB" entrepreneurship training for no less than 5 periods, and train 300 small bosses; 160 small business owners will be added in the city, 2000 new jobs will be created, and the policy system to create a provincial entrepreneurial city will be launched; We should actively create provincial demonstration counties for rural labor transfer and employment; The coverage rate of human resources and social security platform construction in the streets and towns of the city has reached more than 85%, and more than two fully employed communities have been created< In 2011, Anshun City will further carry out etiquette learning activities for millions of citizens. More than 11000 secondary vocational school students have been recruited, 5000 skilled talents have been trained for the society, and more than 15000 labor force have been trained; Alt higher ecation has enrolled more than 2300 students; The gross enrollment rate of senior high school ecation is 46%, and that of higher ecation is 17%. In order to improve the quality of science and technology, vocational skills and business ability as the core, large-scale rural practical technology training. We will promote the construction of provincial key demonstration secondary vocational schools in Anshun vocational secondary schools<
● social security
realize the full coverage of urban and rural social assistance system
the number of basic endowment insurance participants has reached 125152, basically solving the problems left over by the history of pension security for uninsured family members and temporary workers. The number of urban basic medical insurance participants reached 376419. We will improve the minimum living security system for urban and rural residents and achieve full coverage of the urban and rural social assistance system. Urban and rural minimum living security should be guaranteed as much as possible and guaranteed according to the standard under dynamic management. We should improve the social security system for land expropriated farmers and realize the connection with the new rural endowment insurance pilot and the basic endowment insurance system for urban workers as soon as possible. The measures for the qualification of urban low-income families were issued, the temporary relief system and urban and rural medical relief system were standardized and improved, and the temporary relief funds, rural five guarantees funds and rural five guarantees construction funds were included in the local financial budgets at all levels, which were increased year on year. The number of unemployment, work-related injury and maternity insurance insured reached 68305, 82841 and 101475 respectively
the municipal funeral service center was built and put into use, and the crematorium and cemetery projects were started. The construction of Anshun urban public transport hub terminal was started<
● people live in peace
realize the dream of low-income families' "Snail House"
9803 sets of low rent housing, 1309 sets of affordable housing, 380 sets of public rental housing, 40 sets of price limited commercial housing, 300 sets of urban shantytowns, 400 sets of state-owned instrial and mining shantytowns and 327 sets of forest shantytowns are newly constructed. Basically solve the housing problem of urban low-income families whose per capita housing construction area is less than 15 square meters in Anshun. All construction contents of the "6.28" post disaster reconstruction, relocation and resettlement project in Gangwu Town, Guanling Autonomous County were completed, and 655 people from 149 households were resettled to ensure the smooth resettlement of the victims. Do a good job in the relocation of rural houses and schools threatened by geological disasters
start the construction of Wudang road and Beishan Road, start the construction of two pedestrian overpasses in the central urban area, complete the "white to black" road project in the main street of Xixiu District, and do a good job in the construction of sewage collection pipe network project and domestic waste collection and transportation system project in the central urban area. The first phase construction of the new campus of Anshun No.2 Middle School was completed. We should do a good job in the reconstruction of the streets and alleys in the central urban area<
● infrastructure
solve the problem of safe drinking water for 150000 people
invest 250 million yuan to complete 65.5 kilometers of national and provincial trunk lines. The implementation of township (town) smooth engineering and other rural highway construction projects. To solve the problem of safe drinking water for 150000 people, we have completed 27 dangerous reservoirs, 100 square kilometers of soil erosion control area, 34000 mu of "water and tobacco supporting" project construction task, implemented two small and medium-sized river control projects, and ensured the completion of two "Ziqian" projects of rape River Reservoir and Ziyun Luga reservoir in Xixiu District. The construction of rural power grid was improved, and 186.86 million yuan was invested in the construction and transformation of rural power grid. The complete transformation rate of administrative village power grid was 100%, the power supply reliability rate of rural power grid was 98.6%, and the comprehensive line loss rate of rural power grid was reced to 12%. More than 167.98 million yuan has been invested in upgrading the urban power grid, 30 new township (town) radio and television service stations have been built, the cable television network of 40 towns has been transformed and digitized as a whole, 651km optical communication cables have been built in rural areas, 480 mobile communication base stations have been built, 80 administrative villages have been added to realize optical fiber access, and 30 natural villages have been added to connect telephone<
● environmental improvement
landscape renovation along Shanghai Kunming highway was completed
focusing on expressways, high-speed railways, main trunk roads, scenic spots, instrial parks, main reservoir areas and historical and cultural towns, rural living environment improvement projects were carried out in a series. In the first half of 2011, we completed the preparation, evaluation and approval of all pilot village construction (renovation) plans, and achieved initial results this year. By the end of October 2011, the renovation of architectural landscape along Anshun of Shanghai Kunming expressway will be completed. We should do a good job in the implementation plan and project planning of the pilot project of "one case, one discussion" financial awards and subsidies for village level public welfare undertakings in 2011, actively apply to the province, and strive for Guanling Autonomous County (including Baishui town) and Ziyun Autonomous County to enter the pilot scope of the whole province
● culture and sports
build a number of public welfare cultural and sports venues
build 50 farmers' cultural homes and 508 farmers' Book houses. Complete the maintenance and construction of two County Libraries (cultural centers); Complete the equipment configuration of 20 Township comprehensive cultural stations, and equip 2 community cultural centers and 2 community cultural activity rooms; Complete 20 cultural information resource sharing projects of township (town), community primary service point equipment. Ten village level farmers' sports fitness projects, two township level farmers' sports fitness projects, 12 community fitness path projects, one county-level Stadium "snow charcoal project" have been built, and the construction of municipal National Fitness Center (athletes' apartment) and Municipal Cultural Center (power plant workers' Club) have been started. 22044 rural public welfare films were screened. More than 60 performances of "three cultural trips to the countryside" were organized<
● medical and health
the relocation project of Anshun people's hospital was started
the per capita basic public health service fund reached 20 yuan. Consolidate and improve the new rural cooperative medical system, implement the government subsidy standard of 120 yuan per person per year, and the participation rate is stable at more than 95%. Five Township family planning service stations were newly built or expanded, and 80 village family planning service rooms were newly built or expanded. We should do a good job in the prevention and control of infectious diseases and maternal and child health care, control the outbreak of infectious diseases, and rece maternal and infant mortality. One tertiary hospital in our city and two tertiary hospitals in Zhejiang Province were organized to support five county-level hospitals in our city. We should implement the national essential drug system in primary medical and health institutions run by the government, equip and use essential drugs, and implement zero margin sales. We started the relocation project of the Municipal People's Hospital, started the standardization construction project of Xixiu District and Pingba County hospitals, and completed the standardization construction project of Puding and Ziyun county hospitals<
● social management
ten thousand monitoring points monitor the urban area
basically complete the construction of the city's urban alarm and monitoring system ("Skynet project"), and speed up the construction of the second phase of the urban alarm and monitoring system, with 10000 front-end monitoring points, 1000 alarm points, and the city's central area, main roads, key and critical parts of the case The main entrances and exits of the campus and key areas are all equipped with video monitoring probes, and the monitoring and alarm network sharing with provincial, municipal and county public security organs should be realized. Schools at all levels and of all types shall be equipped with full-time security personnel according to the proportion of 2 to 3 students below 500, 3 to 5 students between 500 and 1000, and no less than 3 ‰ of the total number of students above 1000
complete the construction of rescue and Protection Center for street children and children's welfare home. We should strengthen the management of the floating population, establish a comprehensive information system for the service and management of the floating population, and graally promote the "one card" management methods such as residence permit and social security card.
3. It's a big question... What's pressure resistance? The ability to cope with stress? In short, these four abilities belong to the activity range of the brain, which are based on neurons, brain hormone or neurotransmitter network, brain activity and brain connection. And these abilities are not independent and unrelated networks in the brain, nor is a certain brain area responsible for a certain ability, and the rest is ignored. Of course, there are differences in the brain areas that perform the main functions. For example, the declarative memory in memory is related to the hippocampus, the emotional memory (implicit memory) is related to the amygdala, the motor ability is related to the motor cortex, and the brain areas related to stress are mainly the hypothalamus, amygdala and hippocampus. If it involves the response to stress, it also involves the function of the prefrontal lobe, Operation is mainly related to logic, involving part of the function of the left temporal lobe. In fact, these functions will also affect each other. For example, studies have shown that exercise can enhance memory, most likely because a healthy body provides enough energy for the brain to perform memory function. In addition, the impact of stress on memory is my research topic. Stress at different stages has different effects on memory: for example, for declarative memory, when acute stress occurs in the memory formation stage, that is, the learning stage, it can improve attention and enhance the formation of memory; If acute stress occurs in the memory retrieval stage, that is, the memory retrieval stage, a large number of stress hormones will rece the activity of the hippocampus and damage the memory retrieval. So if you want a more scientific answer, at least in my opinion, it is more difficult, because these four abilities involve a lot of brain functions, especially the cooperation of brain regions, so I can only roughly answer that these four abilities can influence each other and enhance each other in moderate cases
Adoption
Adoption
4. Newton's second law: F = ma
5. In the actual operation, it is not necessary to use the plus and minus sign, just specify the positive direction before solving the problem. In the positive direction, it will increase in the same direction, otherwise it will decrease.
6. In my opinion, the resistance to accelerating air is a variable force, which is why we consider it from the angle of energy rather than from the angle of resistance integral. According to your method, we know that P = FV is actually the instantaneous power when the force pulls a certain mass of object, but we should know that in different times, with the acceleration of speed, more air is compressed to do work per unit time, so this formula is not applicable. From the problem solution, in DT time, through the consideration of energy conversion, it is really accurate, which is the real embodiment of instantaneous power
I am about to graate from University, so I use differential to understand the infinitesimal method
I am about to graate from University, so I use differential to understand the infinitesimal method
7. The acceleration a of the object is calculated according to the kinematic formula, and the force F = ma is obtained from Newton's second law
8. Hello
inertia is a kind of state. You have not yet distinguished the difference between inertia and force. The meaning of inertia is that when a force is applied to an object, it is a state without physical quantity
F = ma
is the law of two oxen
if it helps you, please adopt it.
inertia is a kind of state. You have not yet distinguished the difference between inertia and force. The meaning of inertia is that when a force is applied to an object, it is a state without physical quantity
F = ma
is the law of two oxen
if it helps you, please adopt it.
9. First of all, you have to train yourself to do right every time you do a question. Check it every time you finish a question. Don't check all the papers again. In this way, your memory of this question is still fresh, and you can easily find some low-level calculation errors. Also, when calculating problems, try to concentrate your mind and don't think about it. While calculating, you can whisper what you mean. In this way, you can force your attention to focus on the calculation and make fewer mistakes. Finally, it's very important to practice more. No matter how good the theory is, it's useless if you don't have enough questions to do the foundation.
good luck
good luck
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