Хушасси
Хушасси — арифметикăлла тăвăмсенчен пĕри. Унашкал тăвăм арифметикăра çеç мар, математикăн ытти уйрамĕсенче те пур. Алгебрăра вăл ăнлав арифметикăри ăнлава анлăлатнипе пулать.
Вуламалли
тӳрлет- Baroody, Arthur; Tiilikainen, Sirpa (2003). https://archive.org/details/developmentofari0000unse/page/75 |url= missing title (help). The Development of Arithmetic Concepts and Skills. Two perspectives on addition development. Routledge. p. 75. ISBN 0-8058-3155-X.
- Davison, David M.; Landau, Marsha S.; McCracken, Leah; Thompson, Linda (1999). Mathematics: Explorations & Applications (TE ed.). Prentice Hall. ISBN 978-0-13-435817-8.
- Bunt, Lucas N.H.; Jones, Phillip S.; Bedient, Jack D. (1976). The Historical roots of Elementary Mathematics. Prentice-Hall. ISBN 978-0-13-389015-0.
- Poonen, Bjorn (2010). "Addition". Girls' Angle Bulletin. 3 (3–5). ISSN 2151-5743.
- Weaver, J. Fred (1982). Addition and Subtraction: A Cognitive Perspective. Interpretations of Number Operations and Symbolic Representations of Addition and Subtraction. Taylor & Francis. p. 60. ISBN 0-89859-171-6.