質問: countdown from 10 or count backward. which one is natural to say? は 英語 (アメリカ) で何と言いますか? countdown from 10 or count backward. which one is natural to say? は 英語 (アメリカ) で何と言いますか?
回答: both "count down from 10 to 1" and "count backwards from 10 to 1" are natural/correct.