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How to do the last two questions on the third page of the sixth grade in the primary school mathematics evaluation manual
Write down your questions.

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