Tatomir P. Anđelić was born on November 11, 1903 in a small village Bukovica, between towns of Čačak and Kraljevo in the family of six children. His mother Dmitra was illiterate, but his father Pavle, a landowner with rudimentary schooling, was a people's democratic delegate. Tatomir was the only boy of six children.
He finished elementary school in town of Mrčajevci in 1914, and resumed his education after the World War I in 1919. In one year he successfully passed six grades of then gymnasium, and his senior grade passed successfully in town of Čačak in 1922. Today the school remembers him as one of its most famous students.
From October 1928 until September 1945 he taught mathematics in high school, mostly in the Second Belgrade's Gymnasium. At the same time, he was employed by the University of Belgrade part-time as teacher's assistant at the department of mechanics in the class of Professor Bilimović.