Translation of "Olds" in Japanese

Yes, 80-year-olds!

そう80歳の生徒たちがいます！

One evening, after a long day of teaching eight-year-olds

ある夜 デンバーの小学校で ８歳の子ども達を教え

You know, 28 out of 30 nine-year-olds would go:

30人中28人の９歳の子は こう言うでしょう

All the way up to 70- and 80-year-olds ballet ... plus.

70歳から80歳超…

We've got 90% of 12 year-olds watching porn on a regular basis.

平均して12歳の90％が ポルノを定期的に見ています

As is often the case with 13 to 19 year olds, she's conceited.

１３歳から１９歳の少年少女によくあることだが彼女はうぬぼれている。

As is often the case with 13 to 19 year olds, she fell in love.

ティーンエイジャーにはよくあることだが、彼女は恋をした。

- As is quite common for teenagers aged from 13 to 19, she's conceited.
- As is quite common for teenagers aged from 13 to 19, she's vain.
- As is quite common for teenagers aged from 13 to 19, she's full of herself.
- As is often the case with 13 to 19 year olds, she's conceited.
- As is often the case with teenagers, she's conceited.

１３歳から１９歳の少年少女によくあることだが彼女はうぬぼれている。