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THE DICTIONARY VORTARO
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“La Vortaro”Pilger: “BER”Bick: “Esperanto-dansk”
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THE INSTANT MESSENGER TUJMESAĜILO
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Numbers
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Basic numbers 0 - nul 1 - unu 2 - du 3 - tri 4 - kvar 5 - kvin 6 - ses 7 - sep 8 - ok 9 - naŭ 10 - dek 100 - cent 1000 - mil |
Other numbers are created by joining the basic numbers together. 11 - dek unu 12 - dek du 20 - dudek 25 - dudek kvin 237 - ducent tridek sep 1983 - mil naŭcent okdek tri 2002 - du mil du |
Tens and hundreds are joined to form one word.
dudek, tridek, ducent, tricent
Everything else should be spoken and written as separate words, including thousands.
dek unu, dek du, du mil
The basic numbers are not declined.
Mi vidas tri domojn. - I see three houses.
Ordinal numbers are created by the ending -a. They are declined like adjectives.
unua - first
dua - second
deka - tenth
okdek naŭa / okdek-naŭa - eighty-ninth (correct both with and without the hyphen between the words when it is a number that requires multiple words)
Mi skribas la unuan leteron. - I write the first letter.
More detailed explanations
Read here.
Exercises