18.1.1 diecisiete and veinticinco but treinta y tres and cuarenta y ocho

diecisiete (seventeen) and veinticinco (twenty-five) are written as one word. But numbers higher than thirty have their singles as a separate word after y: treinta y cinco, cuarenta y tres, cincuenta y seis aber veinticinco, veinticuatro, dieciocho, diecinueve, veintisiete und veinticuatro.

Furthermore are once (eleven), doce (twelve), trece (thirteen), catorce (fourteen) and quince (fifteen) irregular.





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