In 1996, M. Stojaković and Z. Stojaković examined the convergence of a sequence of fuzzy numbers via Zadeh's Extension Principle, which is quite difficult for practical use. In this paper, we utilize the notion λ−level sets to deal with convergence and summable related notions and adopted a relatively new approach to characterize matrix classes involving some sets of single sequences of fuzzy numbers. The approach is expected to be useful in dealing with characterization of several other matrix classes involving different kinds of sets of sequences of fuzzy numbers, single or multiple.