The bus traveled for 1 hour and 20 minutes at a speed of 60 km / h. How many kilometers did the bus travel during this time?

In order to find out the distance, you need to multiply the speed by time.
Since the time we have, according to the condition of the problem, is 1 hour 20 minutes, so we find out how many kilometers the bus traveled in 1 hour and in 20 minutes.
In 1 hour, the bus passed:
1 * 60 = 60 km.
And 20 minutes is a third of an hour, which means that in 20 minutes the bus traveled 3 times less:
60: 3 = 20 km.
Then for all the time the bus passed:
60 + 20 = 80 km.