Primary school students will not use the method of column equation to solve, so this analysis:

Question 1 warehouse a transports 40 tons of grain to warehouse b, and the stocks of the two warehouses are exactly equal. It means that warehouse A is 80 tons more than warehouse B, and this 80 tons is twice (the grain in warehouse A is three times that in warehouse B), so it is 40 tons every time, warehouse A: 40*2=80 tons, and warehouse B: 40 tons.

Question 2: Warehouse A transports part of it to Warehouse B, so that the grain storage of Warehouse B is twice that of Warehouse A.. Then the total number is three times that of warehouse A, (180+120)/3 =100,

180- 100=80