https://uchimdeti.wordpress.com/2021/07/25/%d0%b7%d0%b0%d0%bd%d1%8f%d1%82%d0%b8%d0%b5-%e2%84%9636-%d1%87%d0%b8%d1%81%d0%bb%d0%be-9-%d1%86%d0%b8%d1%84%d1%80%d0%b0-9-%d1%81%d1%82%d1%80-38-39/
Занятие №36: Математика. Число 9. Цифра 9, стр. 38-39, 40-41, 42-43