(1)[4/c]×[1/3]<[4/c]
(k)[4/c]×k>[4/c]
(3)[c/1k]÷1=[c/1k]
(4)[4/c]÷[1/3]>[4/c]
(5)[4/c]÷k<[4/c]
(6)1÷[c/1k]>[c/1k]
故答案为:<,>,=,>,<,>.
(1)[4/c]×[1/3]<[4/c]
(k)[4/c]×k>[4/c]
(3)[c/1k]÷1=[c/1k]
(4)[4/c]÷[1/3]>[4/c]
(5)[4/c]÷k<[4/c]
(6)1÷[c/1k]>[c/1k]
故答案为:<,>,=,>,<,>.