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Whole Numbers and Ordinal Numbers: 10,000 to 99,999

Numbers from 10,000 through 90,000, counting by ten thousands, are:

10,000th ten thousandth
20,000th twenty thousandth
30,000th thirty thousandth
40,000th forty thousandth
50,000th fifty thousandth
60,000th sixty thousandth
70,000th seventy thousandth
80,000th eighty thousandth
90,000th ninety thousandth

Ordinal numbers above 99th are not written out in words in everyday use. Sometimes you see ordinal numbers written out on a formal document such as a college degree.

In American English, we write 42,000th as forty-two thousandth. We write 97,020th as ninety-seven thousand twentieth.

In British English, we write 42,000th as forty-two thousandth. We write 97,020th as ninety-seven thousand and twentieth.

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