Câu 4: Trang 139 sách giáo khoa (SGK) toán tiếng Anh lớp 4There is a gas storage. The first time...

Using the fact that the amount of gasoline left after the second time is 56,200 liters, we can set up the equation x - 43,800 = 56,200 and solve for x. So, x = 100,000 liters. Therefore, at the beginning, there were 100,000 liters of gasoline in the storage.

Therefore, the total amount of gasoline that was taken out is 32,850 + 10,950 = 43,800 liters.

The next time they took out by 1/3 of the first time, which is (1/3)*32,850 = 10,950 liters.

The first time people took out 32,850 liters of gasoline from the storage.

According to the problem, the amount of gasoline left in the storage after the second time is 56,200 liters.