OICC Press Mathematical Analysis and its Contemporary Applications 2 1 2020 03 20 A simple method to solve nonlinear Volterra-Fredholm integro-differential equations 10.30495/maca.2020.679851 EN Mohsen Mohamadi Department of Mathematics, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran. Amir Shahmari Department of Mathematics, Ayatollah Amoli Branch, Islamic Azad University, Amol, Iran. Journal Article 2020 03 20 In this paper, a new simple direct method to solve nonlinear Fredholm-Volterra integral equations is presented. By using Block-pulse (BP) functions, their operational matrices and Taylor expansion a nonlinear Fredholm-Volterra integral equation converts to a nonlinear system. Some numerical examples illustrate accuracy and reliability of our solutions. Moreover, the effect of noise shows our method is stable.