Numbers from 20 to 100: How and When to Use in English

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Numbers from 20 to 100

From 20 to 100, all the numbers whose second digit is 0 end in -ty (except 100).

20 → twenty

30 → thirty

40 → forty

50 → fifty

60 → sixty

70 → seventy

80 → eighty

90 → ninety

100 → one hundred

If the second digit is not 0, write each number as two words separated by a hyphen (-).

34 → thirty-four

41 → forty-one

56 → fifty-six

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