28 children were riding on the bus. At the bus stop 82 children got on the bus while some got off the bus. Then there were 30 children altogether on the bus. How many more children got on the bus than those that got off?
There were 28 children riding on the bus. 

Then, 82 children got on the bus, while some got off the bus. 

This means that the total number of children on the bus at this point was 82 + 28, or 110. 

However, we know that there were only 30 children on the bus in the end. 

This means that 30 - 110 children must have gotten off the bus. 

In other words, 110 - 30, or 80, children must have gotten on the bus. 

Therefore, the answer is 80.