HAKIMOVA MARJONA ISKANDARZODA; DOTS. NORMO`MINOV SHERZOD TO`YCHIYEVICH. MENTAL ARITHMETIC IN ELEMENTARY SCHOOLS. Spectrum Journal of Innovation, Reforms and Development, [S. l.], v. 24, p. 94–96, 2024. Disponível em: https://sjird.journalspark.org/index.php/sjird/article/view/962. Acesso em: 5 dec. 2024.