9/2-5/2= 18\2:36-3\2= 18\2:(36-32)= решите пожалуйста

9/2 - 5/2 = 4/2 = 2 18/2 : 36 - 3/2 = 1/4 - 3/2 = 1/4 - 6/4 = - 5/4 = - 1,25 18/2 : ( 36 - 32 ) = 18/2 : 4 = 18/8 = 9/4 = 2,25