Question

А) 4ч58мин+2ч17мин-3ч29минб) 18мин9с-7мин46с+48мин35св) 4мин52с*5г) 7ч3мин:9

Answer 1

А) 4:58 + 2:17 - 3:29 = 7:15 - 3:29 = 3:46 = 3 ч. 46 мин.
б) 18:9 - 7:46 + 48:35 = 10:23 + 48:35= 58:58 = 58 мин. 58 сек.
в) 4:52 × 5 = 26:20 = 26 мин. 20 сек.
г) 7:39 : 9 = 459 : 9 = 51 сек.
Решено,
IhumanI.

Answer 2

А 152 минуты                   
б - 2292 секунды
в 1460 секунд
г 47 минут

Answer 3

Let's solve each of the expressions step by step:

А) 4ч58мин + 2ч17мин - 3ч29мин

To add and subtract time, we need to consider hours and minutes separately:

4 hours + 2 hours - 3 hours = 3 hours

58 minutes + 17 minutes - 29 minutes = 46 minutes

So, the result is 3 hours and 46 minutes.

б) 18мин9с - 7мин46с + 48мин35с

To add and subtract time with seconds, we'll do the same:

18 minutes - 7 minutes + 48 minutes = 59 minutes

9 seconds - 46 seconds + 35 seconds = -2 seconds

Since we have a negative value for seconds, we can borrow 1 minute from 59 minutes:

59 minutes - 1 minute = 58 minutes

So, the result is 58 minutes and -2 seconds. If we want to express it in a more standard way, we can say it's 57 minutes and 58 seconds.

в) 4мин52с * 5

To multiply time by a number, we'll convert the time to seconds, perform the multiplication, and then convert it back to minutes and seconds:

4 minutes 52 seconds = (4 * 60) + 52 = 252 seconds

252 seconds * 5 = 1260 seconds

Now, we convert it back to minutes and seconds:

1260 seconds = (1260 / 60) minutes + (1260 % 60) seconds = 21 minutes + 0 seconds

So, the result is 21 minutes.

г) 7ч3мин : 9

To divide time by a number, we'll first convert the time to minutes and then perform the division:

7 hours 3 minutes = (7 * 60) + 3 = 423 minutes

423 minutes / 9 = 47 minutes

So, the result is 47 minutes.

Therefore, the final answers are:

А) 3 hours and 46 minutes б) 57 minutes and 58 seconds в) 21 minutes г) 47 minutes