TY - JOUR TI - A decomposition algorithm coupled with operational matrices approach with applications to fractional differential equations AU - Talib Imran AU - Alam Md. Nur AU - Baleanu Dumitru AU - Zaidi Danish JN - Thermal Science PY - 2021 VL - 25 IS - 102 SP - 449 EP - 455 PT - Article AB - In this article, we solve numerically the linear and non-linear fractional initial value problems of multiple orders by developing a numerical method that is based on the decomposition algorithm coupled with the operational matrices approach. By means of this, the fractional initial value problems of multiple orders are decomposed into a system of fractional initial value problems which are then solved by using the operational matrices approach. The efficiency and advantage of the developed numerical method are highlighted by comparing the results obtained otherwise in the literature. The construction of the new derivative operational matrix of fractional legendre function vectors in the Caputo sense is also a part of this research. As applications, we solve several fractional initial value problems of multiple orders. The numerical results are displayed in tables and plots.