

Я живу в квартире восемьдесят.
I live in apartment eighty.
Дедушке скоро будет восемьдесят.
Grandpa will soon be eighty.
Кофе стоит восемьдесят рублей?
Does the coffee cost eighty rubles?
"восемьдесят" is in the lesson "Big numbers" (Level 4), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,380 words in total. Every word has an illustration, a transcription and pronunciation in a female and a male voice. Just 10–15 minutes a day is enough to learn them all. Free, and works offline.