

이 빵집은 칠십 년 됐어요.
[i p͈aŋt͡ɕipɯn t͡ɕʰils͈ip njʌn twɛs͈ʌjo.]
This bakery has been around for seventy years.
칠십 번 버스가 안 와요.
[t͡ɕʰils͈ip pʌn pʌsɯka an wajo.]
Bus number 70 isn't coming.
할머니는 올해 칠십 세세요.
[halmʌninɯn olɛ t͡ɕʰils͈ip sesejo.]
My grandmother is seventy this year.
"칠십" 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.