Question

20ч 16мин+1ч 44мин 10ч 25мин-9ч 35мин 17ч 30мин+2ч 40мин 4мин 57с+2ч 6с 16ч 45мин-,30мин 27мин 36с-14мин 42с

Answer 1

1)22часа
2) 3000 сек
3)20.1666667часа
4)2.08416667часа
5) 16.25 часа
6) 774 сек

Answer 2

1:22час
2:50 мин
3:20 час 10 мин
4:2 час 5 мин 3 сек
5:16 час 15 мин
6:12 мин 54 сек

Answer 3

Let's solve each arithmetic operation step by step:

1. 20 hours 16 minutes + 1 hour 44 minutes: 20 hours + 1 hour = 21 hours 16 minutes + 44 minutes = 60 minutes (1 hour) So, 20 hours 16 minutes + 1 hour 44 minutes = 21 hours 1 minute.

2. 10 hours 25 minutes - 9 hours 35 minutes: 10 hours - 9 hours = 1 hour 25 minutes - 35 minutes = -10 minutes (Note: Negative minutes are the same as saying 10 minutes before the previous hour) So, 10 hours 25 minutes - 9 hours 35 minutes = 1 hour - 10 minutes = 50 minutes.

3. 17 hours 30 minutes + 2 hours 40 minutes: 17 hours + 2 hours = 19 hours 30 minutes + 40 minutes = 70 minutes (1 hour and 10 minutes) So, 17 hours 30 minutes + 2 hours 40 minutes = 19 hours 10 minutes.

4. 4 minutes 57 seconds + 2 hours 6 seconds: 4 minutes + 2 hours = 2 hours 4 minutes (Note: The seconds are disregarded when we add minutes to hours) 57 seconds + 6 seconds = 63 seconds (1 minute and 3 seconds) So, 4 minutes 57 seconds + 2 hours 6 seconds = 2 hours 4 minutes 1 minute and 3 seconds = 2 hours 5 minutes 3 seconds.

5. 16 hours 45 minutes - 30 minutes: 16 hours - 0 hours = 16 hours 45 minutes - 30 minutes = 15 minutes So, 16 hours 45 minutes - 30 minutes = 16 hours 15 minutes.

6. 27 minutes 36 seconds - 14 minutes 42 seconds: 27 minutes - 14 minutes = 13 minutes 36 seconds - 42 seconds = -6 seconds (Negative seconds are the same as saying 6 seconds before the previous minute) So, 27 minutes 36 seconds - 14 minutes 42 seconds = 13 minutes - 6 seconds = 12 minutes 54 seconds.

I hope this helps! Let me know if you have any further questions or need additional assistance.