Question

21ч15мин+6ч49мин-1сут​

Answer 1

21 час это 1260 минут + 15 минут это 1275
6 часов это 360 минут +49 минут это 409
1 сутки 1440 минут
1275+ 409-1440= 244 минуты

Answer 2

To calculate the sum, you need to convert all the time values to the same units (hours and minutes) before adding or subtracting them.

1 day = 24 hours

Let's start with the conversion:

1. 1 day (24 hours) = 24 hours + 0 minutes
2. 21 hours + 15 minutes
3. 6 hours + 49 minutes

Now, add the hours and minutes separately:

Hours: 21 hours + 6 hours = 27 hours Minutes: 15 minutes + 49 minutes = 64 minutes

Since 60 minutes = 1 hour, you can represent 64 minutes as 1 hour and 4 minutes (64 - 60 = 4).

Now, add the final results together:

27 hours + 1 hour = 28 hours 4 minutes

So, the sum of 21 hours 15 minutes, 6 hours 49 minutes, and 1 day is 28 hours 4 minutes.