Exact multiple of ten
30 is exactly 3 tens. Its ones digit is zero, so no ones word or hyphen is added.
30 in words: thirty
30
In words
Thirty
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How 30 is built
Pattern: Exact multiple of ten
30 is exactly 3 tens. Its ones digit is zero, so no ones word or hyphen is added.
30 has one non-zero place value, so its expanded form is unchanged.
Digit and place-value table
| Digit | Position | Value | Value in words |
|---|---|---|---|
| 3 | tens | 30 | thirty |
| 0 | ones | 0 | not spoken |
Reading the number in groups
| Group | Digits | Reading |
|---|---|---|
| units group | 30 | thirty |
Why 30 is written this way
Silent zero positions
The ones position contains zero. It preserves place value in the numeral but adds no spoken word.
Number structure
- 30 has 2 digits and 1 place-value group.
- 1 position contributes a spoken value; 1 zero position is silent.
- Its single two-digit group is 30, written “thirty”.