Question

4ч 5 мин + 34 мин= 5ч 30 мин- 90 мин= 90с + 1 мин 30с=

Answer 1

4ч5мин + 34 мин = 4ч 39 мин
5ч 30 мин - 90 мин = 4 ч
90 с + 1 мин 30 с = 180 с = 3 мин

Answer 2

4ч 5 мин + 34 мин= 4ч 39 мин.
5ч 30 мин - 90 мин= 4 часа.
90 с + 1 мин 30 сек. = 3 минуты.

Answer 3

To solve the given expressions, let's break them down step by step:

1. Adding 4 hours 5 minutes and 34 minutes: 4 hours 5 minutes + 34 minutes = 4 hours + 5 minutes + 34 minutes

   We can add the minutes together: 5 minutes + 34 minutes = 39 minutes

   Therefore, the sum is 4 hours 39 minutes.

2. Subtracting 90 minutes from 5 hours 30 minutes: 5 hours 30 minutes - 90 minutes = 5 hours - 90 minutes + 30 minutes

   Since there are 60 minutes in an hour, we need to convert 5 hours into minutes: 5 hours = 5 hours × 60 minutes/hour = 300 minutes

   Now we can perform the subtraction: 300 minutes - 90 minutes + 30 minutes = 240 minutes + 30 minutes

   The sum is 270 minutes.

3. Adding 90 seconds and 1 minute 30 seconds: 90 seconds + 1 minute 30 seconds = 90 seconds + 60 seconds + 30 seconds

   We convert the 1 minute into seconds: 1 minute = 1 minute × 60 seconds/minute = 60 seconds

   Now we can perform the addition: 90 seconds + 60 seconds + 30 seconds = 150 seconds + 30 seconds

   The sum is 180 seconds.

Therefore, the final result is 180 seconds.