Learn Spanish (Latin America): Nosotros no necesitamos muchos papeles.

The singular word for paper is papel, which ends in a consonant. In Spanish, when a noun ends in a consonant, you make it plural by adding -es rather than just an -s.

Why do we use muchos instead of mucho here?

The word muchos means "many" and it is describing papeles. Because papeles is a masculine and plural noun, the describing word must also be masculine and plural to match it.

Can I leave out the word nosotros in this sentence?

Yes! The verb necesitamos already means "we need" because of its -amos ending. In Spanish, you can often drop the subject pronoun, so just saying No necesitamos muchos papeles is perfectly natural.

How does the negative part of this sentence work without a word for "do"?

To say you "do not" do something in Spanish, you simply put no directly in front of the verb. Spanish does not use extra helper words like "do" or "does" to make a sentence negative.