"un uno una " they seems to be means "1" in Italian. but I don't know which one I should ues

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uno is the word for the number one. but also un, uno, and una are all articles meaning "an/a". una is feminine and used with feminine words (ex. una zebra- a zebra) while un and uno are masculine. un is used most of the time. (ex. un telefonino- a telephone) while uno is the exception. the exception is when a word starts with ps, st, or z. (ex. uno stereo- a stereo) i hope this helped (: and if you ever have any more questions just message me, i have an two copybooks and a textbook that i can help you to learn with ^.^

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它们其实都是冠词，相当于英语的“a/an"
意大利语单词有阴阳之分，一般情况下阴性前用una 如una casa，阳性用un 如un gatto。但是遇到词语，像studente，阳性词但是以st开头，就需要用uno。
此外，uno在表示数字的时候，是一。

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un tavolo
uno studente 
una studentessa

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un tavolo
uno studente 
una studentessa

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un tavolo (M)
uno studente (M)
una studentessa (F)