Learn Polish: Czy cena to 20 złotych i 50 groszy? - Is the price 20 zlotys and 50 groszy?

In Polish, numbers 5 and above (including 20 and 50) require the noun that follows them to take the Genitive plural form. That is why the basic dictionary words złoty and grosz change to złotych and groszy here.

How do you actually read the numbers 20 and 50 in Polish?

20 is dwadzieścia and 50 is pięćdziesiąt. Notice that 50 ends in -dziesiąt, which is a common ending for the tens from 30 up to 90.

Why is to used to mean "is" instead of jest?

When you are linking two nouns or noun phrases together (like "the price" and "20 zlotys"), Polish very often uses to instead of jest. You can think of to as acting like an equals sign between the two halves of the sentence.

Does the word Czy translate directly to "Is" in English?

No, Czy does not actually mean "is". It is a special word used at the very beginning of a sentence to turn a normal statement into a yes/or/no question. The word doing the job of "is" in this sentence is actually to.