The correct spelling is thirteenth.
Some example sentences are:
word form means when you have a number and you write the number in words instead of letters
The gerund or present participle of to write is writing.
Seventy-six and nine tenths.
The plural of twitch is twitches.
nineteen and twenty-six thousandths
Thirteenth.
How to write 64.218 in word form
13th = thirteenth.
write the word form and expanded form of the number four
12 in word form is twelve.
2118077 word form
Seven tenths.
You can write 5.24 in word form as five and twenty-four hundredths
seven and forty two one hundredths
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You can write 14.12 in word form as fourteen and twelve hundredths
One and sixty-five hundredths.