fifty ☊ like: năm mươi → →
fünfzig ☊ 
năm mươi ☊ 
五十 ☊ wǔshí fünfzig ☊ năm mươi ☊ ☊ He's ancient—he must be at least fifty! ☊ ancient ☊
Can you read a car number plate at fifty metres? ☊ at ☊
Fifty pounds is the best I can offer you. ☊ best ☊
I can lend you fifty pounds, if you want. That should help a bit. ☊ bit ☊
The operation has a fifty-fifty chance of success. ☊ chance ☊
There were over fifty applicants for the job. ☊ for ☊
And then there's the little matter of the fifty pounds you owe me. ☊ matter ☊
It cost one hundred and fifty pounds. ☊ one ☊
Career possibilities for women are much greater than they were fifty years ago. ☊ possibility ☊
Roughly speaking, we receive about fifty letters a week on the subject. ☊ roughly ☊
Fifty thousand people saw the match. ☊ see ☊
The house is set (= located) in fifty acres of parkland. ☊ set ☊
I'd say he was about fifty. ☊ would ☊