Question

А)9min 40s+12min 30s-5 min 20s. 10min-5min 20s+7min 50s B)5h 50min+8h 20min+6h 30 min ПОЖАЛУЙСТА ПЛМОГИТЕ СРОЧНО ДАМ 20 БАЛЛОВ

Answer 1

Пошаговое объяснение:

во, вроде ясно )) Если да,то можно лучший ответ?

Answer 2

А) Let's calculate the expression step by step:

9 minutes 40 seconds + 12 minutes 30 seconds - 5 minutes 20 seconds

To simplify the calculation, we can convert all the times to seconds:

9 minutes 40 seconds = 9 * 60 + 40 = 580 seconds 12 minutes 30 seconds = 12 * 60 + 30 = 750 seconds 5 minutes 20 seconds = 5 * 60 + 20 = 320 seconds

Now we can substitute the values and perform the calculation:

580 seconds + 750 seconds - 320 seconds = 1010 seconds

To convert the result back to minutes and seconds:

1010 seconds = 16 minutes 50 seconds

Therefore, the value of the expression is 16 minutes 50 seconds.

B) Let's calculate the expression step by step:

5 hours 50 minutes + 8 hours 20 minutes + 6 hours 30 minutes

To simplify the calculation, we can convert all the times to minutes:

5 hours 50 minutes = 5 * 60 + 50 = 350 minutes 8 hours 20 minutes = 8 * 60 + 20 = 500 minutes 6 hours 30 minutes = 6 * 60 + 30 = 390 minutes

Now we can substitute the values and perform the calculation:

350 minutes + 500 minutes + 390 minutes = 1240 minutes

To convert the result back to hours and minutes:

1240 minutes = 20 hours 40 minutes

Therefore, the value of the expression is 20 hours 40 minutes.

I hope this helps!