How many hours is 9:30 p.m. to 6 a.m.?

9 hours, 9 hours from 9 p.m. to 12 p.m. is 3 hours, and the next day is 6 hours, so it's 9 hours.

Broadly speaking, when a point moves relative to a coordinate system, the line or line segment or curve formed by its motion is one of the times when the point is at rest relative to that coordinate system. Each point corresponds to multiple times.

Relative to a certain time, the faster the point at rest starts to move, the slower the time, when the speed is the same as the point moving in that time, the time stops, and the speed exceeds the point, which is equivalent to going back to the past.

Half past six in the evening, in twenty-four hours, is half past eighteen.

9:30 to 18:30 = 18:30 - 9:30 = 9 hours.

So it's 9 hours between 9:30 in the morning and 6:30 in the evening.

From 9:30 a.m. to 12 p.m., there are two and a half hours; From twelve o'clock in the afternoon to half past six in the evening, there were six and a half hours; Ten hours.

A: Nine hours.

12-9=3 a.m. 12-6=6 so 3+6=9, the working hours are 9 hours. Article 36 of the Labor Law: The State implements a system of working hours in which the daily working hours of workers shall not exceed eight hours and the average weekly working hours shall not exceed forty hours.

Half past six in the evening is half past eighteen, minus half past nine, it should be nine hours, calculated in the twenty-four hour format.

9:30 p.m. to 7:30 a.m. is 10 hours.

Solution: Since 1 hour = 60 minutes, then 30 minutes = hours.

According to the 24-hour clock, 9:30 p.m. is 21:30, which is the hour.

7:30 a.m. is 7:30 a.m. = hour.

Then 9:30 p.m. to 7:30 a.m., hours.

That is, 9:30 p.m. to 7:30 a.m. is 10 hours.

Time in twenty-four hours is written in the format "hours:minutes" (for example, 01:23), or "hours:."

Minutes: Seconds" (01:23:.)

45）。Numbers less than 10 should be preceded by a zero. This zero is not required in the hour section, but it is widely used, especially in computer applications where there are many specific regulations.

The 24-hour clock does not confuse the time of the morning with the time of the afternoon compared to the 12-hour clock (in the 12-hour clock, 7 o'clock can refer to both morning and evening). In a schedule or similar document, it is easy to see at a glance whether the time is in the morning or in the afternoon.

The above content reference: Encyclopedia - 24-hour clock.

10 hours. 7+12-9=19-9=10 hours.

Hour Profile:An hour is a unit of time. The hour is not the SI base unit of time (the SI base unit of time is the second), but an auxiliary unit of time that harmonizes with the SI base unit.

With the exception of leap seconds, an hour is generally equal to 3600 seconds, or 60 minutes, or 1 24 days. The measurement of time in human daily life is generally carried out in hours, for example, the time of day, such as 8 o'clock in the morning is the eighth hour of the day.

9 p.m. and 7 p.m. are expressed in a 24-hour format as (12 7), i.e. 19 o'clock.

: From 9:30 p.m. to 12 p.m

00 12:00-9:30 = 2 hours 30 minutes from 0:0 a.m

00 to 6:306:30-0:

00 = 6 hours and 30 minutes in total: 2 hours 30 minutes + 6 hours 30 minutes = 9 hours.

It is 3 hours from 6:30 to 9:30 a.m. 6:30 p.m. or 6:30 p.m. and 9:30 p.m. 21:00 p.m

30, from half past six in the evening to half past nine in the evening, that is, 21:30-18:30 = 3, so from half past six in the evening to half past nine in the evening, there are 3 Zheng Shi hours.

This kind of problem belongs to the time class addition and subtraction problem, to calculate the time interval from this time to that time, then use time to subtract time, subtract points, and if it is not enough, it is also necessary to borrow one from the previous time.

The algorithm of subtraction:

1. Align the same digits.

2. Count from a single digit.

3. In addition, the full dozens will advance to the higher one, and when the subtraction is not enough to subtract, it will be shouted from the higher one to withdraw 1 when 10 and the number are added and then subtracted.

Summary. Hello dear, happy to answer your questions, 7:30 in the morning to 6:30 in the evening is 11 hours.

Seven and a half in the morning to six and a half in the evening are several hours.

Hello dear, happy to answer your questions, 7:30 in the morning to 6:30 in the evening is 11 hours.

Dear, from 7:30 a.m. to 12 p.m. is four and a half hours, and from 12 p.m. to 6:30 p.m. is six and a half hours, adding up to eleven hours, so 7:30 a.m. to 6:30 p.m. is 11 hours.

Summary. Hello, it's 11 hours and 30 minutes in the morning.

How many hours is 9 p.m. to 8 a.m.?

Hello, I have seen your question and am sorting out the answer, please wait a while until 1:50 am at night is a few hours and a few minutes.

At night until 1:50 a.m. is a few minutes for several hours.

Hello, glad you asked, 9 p.m. to 8 a.m. is 11 hours, if 9 p.m. to 9 a.m. is exactly 12 hours, 8 a.m. then it's 11 hours.

At night until 1:50 a.m. is a few minutes for several hours.

Hello, from 1:50 a.m. to 5 hours and 10 minutes.

Hope mine can help you. Have a great day. If you're happy with my trouble, give it a thumbs up!

By the morning it was a few minutes for a few hours.

Hello, it's 11 hours and 30 minutes in the morning.

By the morning it was a few minutes for a few hours.

Hello, it's also 11 hours and 30 minutes.

It's a few minutes for a few hours.

11 hours and 30 minutes.