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 on the bus to start with. 

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

We don't know how many children got off the bus, but we know that there are now 30 children on the bus. 

So, we need to find out how many more children got on the bus than those that got off. 

We can do this by finding the difference between the number of children that got on the bus and the number of children that got off the bus. 

The number of children that got on the bus is 82. 

The number of children that got off the bus is unknown. 

The difference between the number of children that got on the bus and the number of children that got off the bus is 82 - unknown. 

We want to find the value of unknown. 

We know that the total number of children on the bus is 30. 

We also know that the total number of children on the bus is the sum of the number of children that got on the bus and the number of children that got off the bus. 

So, the total number of children on the bus