When does male endurance start

1. Problem analysis: Hello, men's normal sex life is Asian, Chinese people generally in 30 minutes, but it also varies from person to person. Young, energetic people have longer sex life
suggestions: indivials can have about half an hour or an hour. People with kidney deficiency or sexual dysfunction will have less time. People with premature ejaculation can ejaculate in 10 minutes. If you have sexual dysfunction, please see a doctor in time

2. Each has its own way

3. There's an hour on the film, but it's about half an hour. I haven't tried it

4. According to the scientific explanation, a man is normal for more than three minutes. If we use experience to teach you, then, brother, how old are you. It's normal to have no experience at the beginning. If it's the first time, you can persist for five minutes, then
congratulations
, you are Superman, and you come out the first time
I suggest you do it after you are 20 years old. Now it will have an impact on your physical development

5. It depends on people. We can't generalize.. Thank you. It's a long time for foreign countries

6. Digital currency is a prohibited instry in China at present. So, whether to make money or not is another point. Security is the main point.

7. Calculation ability is the basis of primary school mathematics. Almost all kinds of exercises and examinations involve calculation

to a large extent, it determines the test results of mathematics. If the students have poor computational ability, it is difficult to accurately and timely calculate the correct answers in limited time, which leads to endless questions. Even if they finish the questions in a hurry, there will be problems with low accuracy. How can children's test results be improved

In order to improve the calculation ability of primary school mathematics, we should start from the following aspects:

1. In the process of calculation, we should properly use the law of exchange and combination of addition to simplify calculation:

example 1. Calculation:

(1) 53 + 36 + 47

solution: the original formula = 53 + 47 + 36

= 100 + 36

= 136

(commutative law)

(2) 24 + 44 + 56

solution: original formula = 24 + (44 + 56)

= 24 + 100

= 124

(Law of combination)

2. Learn the skill of "rounding up" in the process of calculation:

example 2. Calculation:

(1) 52 + 69

solution: the original formula = (21 + 31) + 69

= 21 + (31 + 69)

= 21 + 100

= 121

263+18+19

solution: the original formula = (60 + 2 + 1) + 18 + 19

= 60 + (2 + 18) + (1 + 19)

= 60 + 20 + 20 = 100

358+58+58

solution: the original formula = (58 + 2) + (58 + 2) + (58 + 2) - 6

= 60 + 60 + 60-6

= 180-6

= 174

Change the operation order in the process of calculation:

example 3. Calculation:

(1) 57-18 + 19

solution: the original formula = 57 + (19-18)

= 57 + 1

= 58

(1) 23 + 20 + 19 + 22 + 18 + 21

solution: the original formula = (20 + 3) + 20 + (20-1) + (20 + 2) + (20-2) + (20 + 1)

= 206 + (3 + 0-1 + 2-2 + 1)

= 120 + 3 = 123

note: the six numbers are close to 20, and 20 is taken as the reference number

Calculation:

(1) 1999 + 999999

solution: the original formula = (1000 + 999) + 999999

= 1000 + (999 + 999999)

= 1000 + 999 (1 + 999)

= 1000 + 9991000

= 1000 (1 + 999)

= 10001000

= 1000000.

when doing questions, you should practice more, use oral and mental arithmetic, and use more when mastering skills, so that your computing ability will be improved

8. More practice, no shortcut, to pay to have the effect

9. Scitech information 300730
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10. Having sex?