Boshlang‘ich sinflar matematika darslarida kombinatorikaga oid masalalar. «Maktabgacha va maktab ta’limi» [Internet]. 2025 Apr. 15 [cited 2026 Sep. 15];3(4). Available from: https://www.maktabgacha-va-maktab-talimi-jurnal.uz/index.php/jurnal/article/view/886