Anania was primarily devoted to mathematics, which he considered the "mother of all knowledge."
His mathematical books were used as textbooks in Armenia.

Of Anania's several mathematical works, the most important is the book of arithmetic (Համարողութիւն, Hamaroghut’iun or Թւաբանութիւն, T'vabanut'iun), a comprehensive collection of tables on the four basic operations.
It is the earliest extant known work of its kind.
The operations reach up to a total of 80 million, which is the highest number.
A possible theoretical part is believed lost.

Problems and Solutions (alternatively translated as On Questions and Answers), a collection of 24 arithmetical problems and their solutions, is based on the application of fractions; it is the earliest such work in Armenian.
Many of its problems allude to real-world situations: six connect to the princely house of Shirak, the Kamsarakans, and at least three to Iran.
Greenwood calls the problems "a rich source for seventh-century history whose value has not been sufficiently recognized."

The third work, probably an appendix of the book of arithmetic, is titled Խրախճանականք, Xraxc'anakank', literally "things for festive occasions".
It has been translated into English as Mathematical Pastimes, Fun with Arithmetic or Problems for Amusement.
It also contains 24 problems "intended for mathematical entertainment in social gatherings."
According to Mathews this may be the oldest extant text of its kind.
Anania was primarily devoted to mathematics, which he considered the "mother of all knowledge." His mathematical books were used as textbooks in Armenia.
Of Anania's several mathematical works, the most important is the book of arithmetic (Համարողութիւն, Hamaroghut’iun or Թւաբանութիւն, T'vabanut'iun), a comprehensive collection of tables on the four basic operations. It is the earliest extant known work of its kind. The operations reach up to a total of 80 million, which is the highest number. A possible theoretical part is believed lost.
Problems and Solutions (alternatively translated as On Questions and Answers), a collection of 24 arithmetical problems and their solutions, is based on the application of fractions; it is the earliest such work in Armenian. Many of its problems allude to real-world situations: six connect to the princely house of Shirak, the Kamsarakans, and at least three to Iran. Greenwood calls the problems "a rich source for seventh-century history whose value has not been sufficiently recognized."
The third work, probably an appendix of the book of arithmetic, is titled Խրախճանականք, Xraxc'anakank', literally "things for festive occasions". It has been translated into English as Mathematical Pastimes, Fun with Arithmetic or Problems for Amusement. It also contains 24 problems "intended for mathematical entertainment in social gatherings." According to Mathews this may be the oldest extant text of its kind.
Anania Shirakatsi