4.Which number should replace the question mark?[6【4】12] [3【4】9] [3【?】8]

问题描述:

4.Which number should replace the question mark?[6【4】12] [3【4】9] [3【?】8]

我觉得是3,12-6-4=2,9-3-4=2,8-3-3=2