Numbers are essential for telling time, shopping, and giving your phone number. Memorize these first twenty cold.

Numbers 1–10

• 1 — uno, 2 — dos, 3 — tres, 4 — cuatro, 5 — cinco
• 6 — seis, 7 — siete, 8 — ocho, 9 — nueve, 10 — diez

Numbers 11–20

• 11 — once, 12 — doce, 13 — trece, 14 — catorce, 15 — quince
• 16 — dieciséis, 17 — diecisiete, 18 — dieciocho, 19 — diecinueve, 20 — veinte

Quick Tips

• un before masculine nouns: un libro (one book)
• una before feminine nouns: una mesa (one table)
• Numbers 16–19 are one word containing the root diez

Practice by counting objects around you or saying your phone number in Spanish.