How many times the computing power
Publish: 2021-04-12 09:58:13
1. The double precision values of 480 and 580 are basically the same, which are 1 / 16 of the single precision, about 360gflops. In fact, these two cards are not easy to use. The double precision of 280x is three times that of this, about 1000gflops.
2. 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.
3. In the primary school mathematics test questions, the questions involving calculation content account for more than 85% in a test paper. Therefore, it is a very important task for students to strengthen the calculation training and effectively improve the accuracy of calculation. The actual situation shows that the accuracy of a student's calculation is directly proportional to his oral calculation ability. So how to improve the computing power? Please take a look at the following training methods< Basic training
different age of primary school students, the basic requirements of oral arithmetic are also 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. This mental arithmetic training includes the practice of several spatial concepts, digital comparison and memory training. In primary school, it can be said that it is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of people's thinking and intelligence. You can arrange this exercise in two periods. One is to read early, the other is to arrange a group after homework. Each group is divided as follows: one digit is optional, corresponding to the number of one digit or ten digit in two digits. There are 18 questions in each group. Write the formula first, then write the number directly after several times of oral calculation. After a period of time, you will find that your speed and accuracy will be greatly improved< 2. Targeted training
the main form of the number of senior grades in primary school has changed from integer to score. In the number of operations, I believe we do not like the different denominator fractional addition, right? Because it's too error prone. Now, please think for yourself, is the addition (subtraction) method of different denominators only in the following three cases
1. For two fractions, the large number in the denominator is the multiple of the decimal
for example, "1 / 12 + 1 / 3", in this case, oral arithmetic 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, the denominator is expanded by several times, and the numerator is also expanded by the same multiple, It can be calculated by adding the same denominator fraction: 1 / 12 + 1 / 3 = 1 / 12 + 4 / 12 = 5 / 12
2. The denominator of two fractions is coprime
this kind of situation is more difficult in form, and I believe you are also the most headache, but it can be changed into easy: after it is divided, the common denominator is the proct of the two denominators, and the numerator is the sum of the proct of the numerator of each fraction and the other denominator (if it is subtraction, it is the difference of the two procts), such as 2 / 7 + 3 / 13. The oral calculation process is: the common denominator is 7 × 13 = 91, molecule 26 (2 × 13)＋21(7 × 3) = 47, the result is 47 / 91
if the molecules of both fractions are 1, the oral calculation is faster. For example, "1 / 7 + 1 / 9", the denominator is the proct of two denominators (63), and the numerator is the sum of two denominators (16)
3. Two fractions and two denominators are neither coprime numbers nor multiples of decimals
in this case, we usually use the short division method to get the common denominator. In fact, we can also directly calculate the general score in the formula and get the result quickly. The common denominator can be obtained by enlarging the large number in the denominator. The specific method is: to double the large denominator (large number) until it is a multiple of another denominator decimal. For example, 1 / 8 + 3 / 10 expands the large number 10, 2 times, 3 times and 4 times, and compares it with the decimal 8 every time to see if it is a multiple of 8. When it is expanded to 4 times, it is a multiple of 8 (5 times), then the common denominator is 40, and the numerator is expanded by the corresponding multiple and then added (5 + 12 = 17), and the number is 17 / 40
after reading the above, have you found the rule of mental arithmetic in every situation? So as long as you practice more and master it, the problem will be solved< (3) memory training
do senior students feel that sometimes the calculation content in the topic is very extensive? Some of these operations have no specific rules of oral arithmetic, so I have to solve them through memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and 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 between these fractions and decimals
the results of the above numbers, whether in daily work or in real life, are used very frequently. After mastering and remembering them, they can be transformed into abilities and proce high efficiency in calculation< 4. Regular training
1. Mastering the law of operation. There are mainly five laws in this aspect: commutative law and associative law of addition; Commutative law, associative law and distributive law of multiplication. Among them, the multiplication distribution law is widely used and has many forms, including positive use and negative use, and the forms of integer, decimal and fraction. In the multiplication of fractions and integers, we often ignore the application of the law of distribution of multiplication, which makes the calculation complicated. Such as 2000 / 16 × 8. If we use the law of multiplicative distribution, we can calculate the result of 1000 by mouth directly. But if we use the general method of recing false fraction, it is time-consuming and easy to make mistakes. In addition, there are subtraction properties and quotient invariant properties< 2. Regular training. It is mainly the oral calculation method of the square result of the two digit number of 5
3. Master some special cases. For example, in fractional subtraction, if the numerator is not enough to be subtracted after general division, and the numerator subtracted is usually larger than the numerator subtracted by 1, 2, 3 and other smaller numbers, no matter how big the denominator is, it can be directly calculated orally. For example, the difference between 12 / 7 and 6 / 7 is only 1. The difference between 12 / 7 and 6 / 7 must be 1 less than the denominator. The result is 6 / 7 without calculation. Another example is: 194 / 99-97 / 99, if the difference between the numerator and denominator is 2, the difference between the numerator and denominator is 2, and the result is 97 / 99. When the subtracted molecule is larger than the subtracted molecule by 3, 4, 5 and other smaller numbers, the result can be quickly calculated orally. Another example is the mental calculation of the proct of any two digit number and 1.5, which is two digits plus half of it< 5. Comprehensive training
1
2< 3. Comprehensive training of four mixed operation sequences
comprehensive training is concive to the improvement of judgment ability, reaction speed and the consolidation of oral arithmetic
of course, we need to persevere in the above situations. Otherwise, it is difficult to achieve the expected effect if we fish for three days and dry the net for two days
the above five kinds of training should be carried out step by step, but also persevere. It will take some time to improve your math scores. Don't be too eager to succeed.
different age of primary school students, the basic requirements of oral arithmetic are also 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. This mental arithmetic training includes the practice of several spatial concepts, digital comparison and memory training. In primary school, it can be said that it is a sublimation training of abstract thinking of numbers. It is very beneficial to promote the development of people's thinking and intelligence. You can arrange this exercise in two periods. One is to read early, the other is to arrange a group after homework. Each group is divided as follows: one digit is optional, corresponding to the number of one digit or ten digit in two digits. There are 18 questions in each group. Write the formula first, then write the number directly after several times of oral calculation. After a period of time, you will find that your speed and accuracy will be greatly improved< 2. Targeted training
the main form of the number of senior grades in primary school has changed from integer to score. In the number of operations, I believe we do not like the different denominator fractional addition, right? Because it's too error prone. Now, please think for yourself, is the addition (subtraction) method of different denominators only in the following three cases
1. For two fractions, the large number in the denominator is the multiple of the decimal
for example, "1 / 12 + 1 / 3", in this case, oral arithmetic 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, the denominator is expanded by several times, and the numerator is also expanded by the same multiple, It can be calculated by adding the same denominator fraction: 1 / 12 + 1 / 3 = 1 / 12 + 4 / 12 = 5 / 12
2. The denominator of two fractions is coprime
this kind of situation is more difficult in form, and I believe you are also the most headache, but it can be changed into easy: after it is divided, the common denominator is the proct of the two denominators, and the numerator is the sum of the proct of the numerator of each fraction and the other denominator (if it is subtraction, it is the difference of the two procts), such as 2 / 7 + 3 / 13. The oral calculation process is: the common denominator is 7 × 13 = 91, molecule 26 (2 × 13)＋21(7 × 3) = 47, the result is 47 / 91
if the molecules of both fractions are 1, the oral calculation is faster. For example, "1 / 7 + 1 / 9", the denominator is the proct of two denominators (63), and the numerator is the sum of two denominators (16)
3. Two fractions and two denominators are neither coprime numbers nor multiples of decimals
in this case, we usually use the short division method to get the common denominator. In fact, we can also directly calculate the general score in the formula and get the result quickly. The common denominator can be obtained by enlarging the large number in the denominator. The specific method is: to double the large denominator (large number) until it is a multiple of another denominator decimal. For example, 1 / 8 + 3 / 10 expands the large number 10, 2 times, 3 times and 4 times, and compares it with the decimal 8 every time to see if it is a multiple of 8. When it is expanded to 4 times, it is a multiple of 8 (5 times), then the common denominator is 40, and the numerator is expanded by the corresponding multiple and then added (5 + 12 = 17), and the number is 17 / 40
after reading the above, have you found the rule of mental arithmetic in every situation? So as long as you practice more and master it, the problem will be solved< (3) memory training
do senior students feel that sometimes the calculation content in the topic is very extensive? Some of these operations have no specific rules of oral arithmetic, so I have to solve them through memory training. The main contents are as follows:
1
2. The proct of the approximate value of PI 3.14 with one digit and 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 between these fractions and decimals
the results of the above numbers, whether in daily work or in real life, are used very frequently. After mastering and remembering them, they can be transformed into abilities and proce high efficiency in calculation< 4. Regular training
1. Mastering the law of operation. There are mainly five laws in this aspect: commutative law and associative law of addition; Commutative law, associative law and distributive law of multiplication. Among them, the multiplication distribution law is widely used and has many forms, including positive use and negative use, and the forms of integer, decimal and fraction. In the multiplication of fractions and integers, we often ignore the application of the law of distribution of multiplication, which makes the calculation complicated. Such as 2000 / 16 × 8. If we use the law of multiplicative distribution, we can calculate the result of 1000 by mouth directly. But if we use the general method of recing false fraction, it is time-consuming and easy to make mistakes. In addition, there are subtraction properties and quotient invariant properties< 2. Regular training. It is mainly the oral calculation method of the square result of the two digit number of 5
3. Master some special cases. For example, in fractional subtraction, if the numerator is not enough to be subtracted after general division, and the numerator subtracted is usually larger than the numerator subtracted by 1, 2, 3 and other smaller numbers, no matter how big the denominator is, it can be directly calculated orally. For example, the difference between 12 / 7 and 6 / 7 is only 1. The difference between 12 / 7 and 6 / 7 must be 1 less than the denominator. The result is 6 / 7 without calculation. Another example is: 194 / 99-97 / 99, if the difference between the numerator and denominator is 2, the difference between the numerator and denominator is 2, and the result is 97 / 99. When the subtracted molecule is larger than the subtracted molecule by 3, 4, 5 and other smaller numbers, the result can be quickly calculated orally. Another example is the mental calculation of the proct of any two digit number and 1.5, which is two digits plus half of it< 5. Comprehensive training
1
2< 3. Comprehensive training of four mixed operation sequences
comprehensive training is concive to the improvement of judgment ability, reaction speed and the consolidation of oral arithmetic
of course, we need to persevere in the above situations. Otherwise, it is difficult to achieve the expected effect if we fish for three days and dry the net for two days
the above five kinds of training should be carried out step by step, but also persevere. It will take some time to improve your math scores. Don't be too eager to succeed.
4. There is something wrong with the description itself. Ad is an acquisition conversion unit, there is no computing power.
5. Simple answer: before the pipeline is installed and put into operation, the strength test and tightness test must be carried out. Whether the strength and tightness of the installed pipeline system can meet the design requirements, the test pressure and test medium are specified in the drawings. Generally, hydrostatic test is used. Because hydrostatic test is safe, pneumatic test is only used unless there are special requirements. Generally, the two tests are carried out at the same time. First, according to the design requirements, raise the liquid to the design pressure, maintain 8-10 points, and check for damage and deformation. If there is no leakage, keep the pressure for half an hour, and the pressure does not drop, then the tightness is qualified. Steam pipes are the same as other pipes. The above is a simple answer, specific operation, drawings have instructions.
6. It's not necessary
as long as you memorize, these basic things will be printed in your mind
after more practice, you can remember without reciting
(it would be quite painful for me to recite backwards, forwards, singularly or even!)
as long as you memorize, these basic things will be printed in your mind
after more practice, you can remember without reciting
(it would be quite painful for me to recite backwards, forwards, singularly or even!)
7. I don't understand it. I have poor calculation ability. I also say that mathematics and physics are very good. The main thing about computing power is to be careful
it's very slow to memorize things. I think it's generally better to recite things. After all, you have said it yourself, and you can still remember it if you recite it often< After all, memory is repetition. Of course, not remembering may also be related to whether you are really interested in it or not.
it's very slow to memorize things. I think it's generally better to recite things. After all, you have said it yourself, and you can still remember it if you recite it often< After all, memory is repetition. Of course, not remembering may also be related to whether you are really interested in it or not.
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