Learn Romanian: Am două mașini și două case. - I have two cars and two houses.

In Romanian, the number 2 has different forms depending on the noun's gender. Both mașini (cars, singular: mașină) and case (houses, singular: casă) are feminine nouns. We use două for feminine and neuter nouns, and doi for masculine nouns.

mașini and case are both plural feminine nouns, so why do they have different endings?

Feminine nouns in Romanian don't all follow the exact same rule for forming plurals. While both end in -ă in the singular, mașină takes an -i ending in the plural (mașini), whereas casă takes an -e ending (case). It is best to memorize the plural ending when you learn a new noun.

The sentence means "I have...", but where is the word for "I"?

The pronoun eu (I) is optional because the verb form am already tells us exactly who is doing the action. In Romanian, it's very common to drop the subject pronoun unless you want to emphasize it, like saying Eu am două mașini (meaning I am the one who has two cars).

I learned that we sometimes need to put de between a number and a noun. Why isn't it două de mașini?