Learn French: Deux cent cinquante euros, c'est trop cher. - Two hundred and fifty euros is too expensive.

The word cent (hundred) only takes an s if it is multiplied by another number AND is at the very end of the number. For example, two hundred exactly is deux cents. But because fifty (cinquante) comes directly after it here, cent stays singular.

In English we often say 'two hundred and fifty.' Why is there no et in the French number?

Unlike English, French does not use an equivalent of 'and' to connect hundreds to tens or units. You just place the words next to each other: deux cent cinquante. The only time you use et in numbers is for ones, like vingt et un (twenty-one).

Since euros is plural, why does the sentence use the singular c'est instead of ce sont?

When you talk about an amount of money, a weight, or a measurement as a single total, French treats it as a singular concept. That is why we use c'est (it is) rather than ce sont (they are) to describe the price.

Why is the adjective cher (expensive) masculine singular when it refers to 250 euros?