

십이 층에 살아요.
[sipi t͡ɕʰɯŋe salajo.]
I live on the twelfth floor.
십이 번 버스를 타세요.
[sipi pʌn pʌsɯlɯl tʰasejo.]
Take bus number twelve.
책 십이 페이지를 펴세요.
[t͡ɕʰɛk sipi pʰeit͡ɕilɯl pʰjʌsejo.]
Open your book to page twelve.
"십이" 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.