

В году двенадцать месяцев.
There are twelve months in a year.
Ты не спишь? Уже двенадцать!
You're not asleep? It's already twelve!
Я купил двенадцать яиц.
I bought twelve eggs.
"двенадцать" is in the lesson "Numbers" (Level 3), along with 19 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.