Mahmoud Ahmed Darwish. (2023). The study of numbers and basic operations, such as addition, subtraction, multiplication, and division. African Diaspora Journal of Mathematics ISSN: 1539-854X, Multidisciplinary UGC CARE GROUP I, 22(2), 1–12. Retrieved from https://newjournalzone.in/index.php/ijmfsmr/article/view/45