How the word "fifty" is translated into English
I have fifty dollars in my wallet.
[aɪ ˈhæv ˈfɪfti ˈdɑlərz ˈɪn ˈmaɪ ˈwɑlət.]
Our teacher is fifty this year.
[ɑr ˈtitʃər ˈɪz ˈfɪfti ˈðɪs ˈjɪr.]
Can you change fifty euros, please?
[kən jə ˈtʃeɪndʒ ˈfɪfti ˈjʊroʊz, ˈpliz?]
"fifty" is in the lesson "Big numbers" (Level 4), along with 11 other useful words. LinDuo has 180 topic lessons like this one, 2,375 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.