How to spell 9 9 is spelled nine in English. Hear it & practice → On a check To write $9.00 on a check, the words line reads: Nine and 00/100 Full check-writing guide → Related numbers1 one 10 ten 100 one hundred Spelling guidesMoney amountsHow to write dollars in words.Writing a checkStep-by-step for US checks.Ordinals (1st, 2nd…)First, second, third, and beyond.All guidesDates, phones, fractions, decimals… ← 8All numbers10 →