The previous page is sending you to https://interneturok.ru/matematika/2-klass/chisla-ot-1-do-100-numeratsiya/slozhenie-i-vychitanie-vida-30-5-35-30-35-5?seconds=0&chapter_id=2985&book_id=38.

 If you do not want to visit that page, you can return to the previous page.