Italian Cardinal Numbers
Cardinal numbers are the basic numbers that we use in counting, money and math. Cardinal numbers can also be used as adjectives to quantify the amount of an object. Let's go over first the numbers 0 to 100 in Italian:
1: uno (the feminine form is una)
For numbers 31 and over, they follow the same pattern as lower numbers: if the second number begins with a vowel, the final letter of the first number is dropped; if the second number begins with a consonant, the final letter of the first number is kept. If the number is being used as an adjective, it goes before the noun it is modifying.
Now, let's go over numbers 102 and above:
1.000.000: un milione
1.000.000.000: un miliardo
Notice that for 102, the format is similar to forming double digit numbers. If we have multiple thousands, we use the plural form mila. Once numbers break into the thousands, the numeral numbers in Italian use a “." as a separator, comparable to the “," in English.
Most numbers are written as one word, except for numbers with milione and miliardo. The numbers are separated with e (and). For example:
un milione e duecento (1.000.200)
Also, if milione and miliardo are quantifying a noun, the number and noun are separated with di (of):
due milioni di abitanti (two million inhabitants)
In addition, numbers in Italian are masculine.