Silent zero positions
The tens and ones positions contain zero. They preserve place value in the numeral but add no spoken word.
400 in words: four hundred
400
In words
Four hundred
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How 400 is built
Pattern: Exact hundred
400 contains 4 complete hundreds. Both following positions are zero, so the spelling ends with “hundred”.
400 has one non-zero place value, so its expanded form is unchanged.
Digit and place-value table
| Digit | Position | Value | Value in words |
|---|---|---|---|
| 4 | hundreds | 400 | four hundred |
| 0 | tens | 0 | not spoken |
| 0 | ones | 0 | not spoken |
Reading the number in groups
| Group | Digits | Reading |
|---|---|---|
| units group | 400 | four hundred |
Why 400 is written this way
Number structure
- 400 has 3 digits and 1 place-value group.
- 1 position contributes a spoken value; 2 zero positions are silent.
- Its hundreds component is “four hundred”; its final two-digit group is 00.