Generalization and Shortcut Techniques: The Product of Multi-digit Numbers with 11\(^{n}\). Thai Journal of Mathematics, [S. l.], v. 23, n. 3, p. 385–394, 2025. Disponível em: https://thaijmath.com/index.php/thaijmath/article/view/1629. Acesso em: 15 nov. 2026.