R Mastani shabestari - Department of Mathematics,Souane Branch, Islamic Azad University,Souane, Iran
R Ezzati - Department of Mathematics, Karaj Branch, Islamic Azad University, Karaj, Iran

In this paper, rst, we introduce a new classes of fuzzy fractional Volterra-Fredholm integro-di erential equations as where the operator gHDq is a di erential operator in the sense of a given fractional derivative of order q. Then, we present a new approach based on the fuzzy Chebyshevpseudo-spectral numerical method to solve linear and nonlinear fractional-order integro- di erential equations of Volterra type. Finally, some fractional di erential equations are provided and analyzed numerically.

Fuzzy fractional-order integro di erential equations of Volterra type; Fractional derivative; Generalized Hukuhara di erentiability; Generalized fuzzy Caputo di erentiabil- ity.