Question

9ч 20 мин – 6ч 40 мин​

Answer 1

Ответ: 2ч 40мин

Пошаговое объяснение:

переведем в минуты:

9ч 20 мин = 9*60+20 = 540+20 = 560 мин

6ч 40 мин = 6*60 + 40 = 360 + 40 = 400 мин

560 мин - 400 мин = 160 мин = 2часа 40 минут

Answer 2

To subtract these two durations, you need to perform the subtraction separately for the hours and the minutes.

Subtracting the hours: 9 hours - 6 hours = 3 hours

Subtracting the minutes: 20 minutes - 40 minutes = -20 minutes

Since the result of subtracting the minutes is negative, you need to borrow 1 hour from the hours and add 60 minutes to the negative result to get the final value.

Adding the borrowed hour: 3 hours - 1 hour = 2 hours

Adding the 60 minutes: -20 minutes + 60 minutes = 40 minutes

Therefore, the result of subtracting 9 hours 20 minutes from 6 hours 40 minutes is 2 hours 40 minutes.