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

Exercise 1

Drag the correct option into each space to complete these numbers.

67 → -seven 43 → -three 28 → -eight

Drag the correct option into each space to complete these numbers.

67 → sixty 1-seven 43 → forty 2-three 28 → twenty 3-eight
1 sixty:

67 → sixty-seven. The first digit of this number corresponds to the number sixty (60). Example: 64 → sixty-four.

2 forty:

43 → forty-three. This number starts with forty (40), followed by three (3). Example:  45 → forty-five.

3 twenty:

28 → twenty-eight.This number is made up of twenty (20) + eight (8). Example: 27 → twenty-seven.

Exercise 2

Listen to the clips and write the corresponding numbers. Follow the example.

Example: → 34


Listen to the clips and write the corresponding numbers. Follow the example.

Example: → 34


36 1

52 2

90 3

1 36:

You heard 36 (thirty-six) . Example: there are thirty-six (36) hours in a day and a half.

2 52:

You heard 52 (fifty-two) . Example: fifty plus two equals fifty-two (52).

3 90:

You heard 90 (ninety) . Example: a football game lasts ninety (90) minutes.

Exercise 3

Listen to the clips and write the corresponding numbers. 

Example: → 34


Listen to the clips and write the corresponding numbers. 

Example: → 34


71 1

80 2

100 3

1 71:

You heard 71 (seventy-one) . Example: my grandfather is seventy-one (71) years old.

2 80:

You heard 80 (eighty) . Example: there are eighty (80) rooms in the hotel.

3 100:

You heard 100 (one hundred) . Example: there are one hundred (100) centimetres in a metre.

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