Question

6h 45 min +2h 28 min, 2г 3 мес + 3г 9 мес 12 min 30 s-5 min 25 s

Answer 1

1. =9ч 13м
2.=6лет
3.=17мин 55 сек

Answer 2

Let's break down the calculations step by step:

1. Add the times: 6 hours 45 minutes + 2 hours 28 minutes = (6 hours + 2 hours) + (45 minutes + 28 minutes) = 8 hours + 73 minutes

2. To simplify the result from step 1, convert the excess minutes (73 minutes) to hours and minutes: 73 minutes ÷ 60 minutes/hour = 1 hour and 13 minutes

3. Now add the hours from step 1 and the hours from step 2: 8 hours + 1 hour = 9 hours

So, 6 hours 45 minutes + 2 hours 28 minutes = 9 hours 13 minutes.

Now, let's work with the second part:

1. Add the years and months: 2 years 3 months + 3 years 9 months = (2 years + 3 years) + (3 months + 9 months) = 5 years + 12 months

2. Since there are 12 months in a year, we need to convert the 12 months into years and add it to the result from step 1: 12 months ÷ 12 months/year = 1 year

3. Now, add the years from step 1 and the years from step 2: 5 years + 1 year = 6 years

4. Add the minutes and seconds: 12 minutes 30 seconds - 5 minutes 25 seconds

   First, subtract the seconds: 30 seconds - 25 seconds = 5 seconds

   Then, subtract the minutes. Since we're borrowing 1 minute from the 12 minutes, we have: 11 minutes - 5 minutes = 6 minutes

So, 2 years 3 months + 3 years 9 months 12 minutes 30 seconds - 5 minutes 25 seconds = 6 years 6 minutes 5 seconds.