Correct

八十

/ bā shí / 
Strokes

Definition

eighty/80

Example

As a Numeral

eighty

1
Dìbāshí
第八十

eightieth

2
Bāshí
八十
niándài
年代

(in) the eighties; (in) the'80s; (in) the 1980s

3
Bāshí
八十
dàshòu
大寿

one's eightieth birthday