Solution: Take 485 tons from warehouse A and 35 tons from warehouse B, so that the tons of grain stored in warehouse A and warehouse B are equal.

It is known that Warehouse A is 485-35=450 tons more than Warehouse B..

Because the tonnage of grain stored in warehouse A is four times that of warehouse B.

So warehouse a is three times more than warehouse B.

Therefore, warehouse B has 450/3= 150 tons.

Warehouse A has 150*4=600 tons.

A: Warehouse A originally stored 600 tons of grain, while Warehouse B stored 150 tons of grain.