打字速度约80字/分钟用英语怎么拼？

Typing speed is approximately 80 characters/minute
characters是汉字

My typing speed is about/merely 80 letters per minute.

鉴于你说的80字应该是说的字母，所以，这里不能用words。。。
应该用letters。。。。呵呵。。。

The speed of typing is around 80 words/minute

The speed of typing is about 80 words per minute

Typing speed is about 80 letters per minute

I can type about 80 words a minute.