Question

Вычисли: 7 ч 12 мин - 5 ч 45 мин+ 19 ч 50 мин=? 23 мин - 8 мин 15 с - 14 мин 38 с=? Вычисли: 23мин-8мин15сек-14мин38сек=? Писать БЕЗ перевода в СЕКУНДЫ(переводить в часы,мин И так далее)

Answer 1

7 ч 12 мин-5 ч 45 мин+19 ч 50 мин=21 ч 17 мин.
23 мин-8 мин 15 сек-14 мин 38 сек=7 сек.

Answer 2

Calculations

To calculate the given expressions, let's start with the first one:

7 hours 12 minutes - 5 hours 45 minutes + 19 hours 50 minutes

First, we need to perform the subtraction and addition of the hours and minutes separately.

Subtracting the hours: 7 hours - 5 hours + 19 hours = 21 hours

Subtracting the minutes: 12 minutes - 45 minutes + 50 minutes = 17 minutes

So, the result is 21 hours 17 minutes.

Now, let's move on to the second expression:

23 minutes - 8 minutes 15 seconds - 14 minutes 38 seconds

First, we need to convert the seconds to minutes for easier calculation.

Converting the seconds to minutes: 8 minutes 15 seconds = 8 minutes + 15/60 minutes = 8 minutes 0.25 minutes 14 minutes 38 seconds = 14 minutes + 38/60 minutes = 14 minutes 0.63 minutes

Now, we can perform the subtraction:

Subtracting the minutes: 23 minutes - 8 minutes - 14 minutes = 1 minute

Subtracting the converted seconds: 0.25 minutes + 0.63 minutes = 0.88 minutes

So, the result is 1 minute 0.88 minutes, which can be simplified to 1 minute 52.8 seconds.

Finally, let's calculate the third expression:

23 minutes - 8 minutes 15 seconds - 14 minutes 38 seconds

This is the same as the second expression, so the result is 1 minute 52.8 seconds.

I hope this helps! If you have any other questions or need further assistance, feel free to ask.