下面括号里的两个数是按一定的规律组合的,在□里填上适当的数。 (1)(6,9)(7,8)(10,5)(□,13) (2)(1,24)(2,12)(3,8)(4,□) (3)(18,17)(14,10)(10,1)(□,5) (4)(1,3)(5,9)(7,13)(9,□) (5)(2,3)(5,7)(7,10)(10,□) (6)(64,62)(48,46)(29,27)(15,□) (7)(100,50)(86,43)(64,32)(□,21) (8)(8,6)(16,3)(24,2)(12,□)