Page 8 - PPT 8
P. 8
20 seconds < 46 seconds
So, we borrow 1 minute from 19 minutes
= 60 seconds from 19 minutes
60 seconds + 20 seconds = 80 seconds
80 seconds - 46 seconds = 36 seconds
Again, 18 minutes < 52 minutes
So we borrow 1 hour from 40 hours
= 60 minutes from 40 hours
60 minutes + 18 minutes = 78 minutes
78 minutes - 52 minutes = 26 minutes
The answer is 19 hours 26 minutes 34 seconds.
