Spanish numbers from 1 to 100 are built from a small set of core words and clear patterns. Learning them helps you shop, tell time, give dates, read prices, and understand classroom instructions. The most important step is to memorize 1 to 15, then recognize how the tens and compound numbers are formed.
Once the patterns become familiar, counting in Spanish becomes much faster and more natural.
Key Facts
- 1 to 10: uno, dos, tres, cuatro, cinco, seis, siete, ocho, nueve, diez.
- 11 to 15 are special forms: once, doce, trece, catorce, quince.
- 16 to 19 use dieci + number: dieciséis, diecisiete, dieciocho, diecinueve.
- 20 is veinte, and 21 to 29 usually combine into one word: veintiuno, veintidós, veintitrés.
- 30 to 99 usually use tens + y + ones: 31 = treinta y uno, 48 = cuarenta y ocho, 76 = setenta y seis.
- 100 is cien when it stands alone or before a noun: cien estudiantes means 100 students.
Vocabulary
- Número
- Número means number, a word or symbol used for counting or measuring.
- Decena
- Decena means ten or a group of ten, such as veinte, treinta, or cuarenta.
- Unidad
- Unidad means ones place, the final digit in numbers like 34, 58, or 92.
- Y
- Y means and, and it connects tens and ones in numbers from 31 to 99.
- Acento
- Acento means accent mark, which shows where the stress falls in words like dieciséis and veintidós.
Common Mistakes to Avoid
- Writing treinta uno instead of treinta y uno is wrong because numbers from 31 to 99 need y between the tens and ones.
- Using uno before a masculine noun is wrong because uno usually changes to un, as in un libro.
- Forgetting accent marks in dieciséis, veintidós, and veintitrés is wrong because accents show the correct stressed syllable.
- Saying veinte y cinco for 25 is not the standard form because 21 to 29 are usually written as one word, such as veinticinco.
Practice Questions
- 1 Write these numbers in Spanish words: 14, 27, 39, 56, 88.
- 2 Convert these Spanish numbers into digits: diecinueve, treinta y cuatro, sesenta y dos, noventa y nueve, cien.
- 3 Explain why 24 is written veinticuatro but 34 is written treinta y cuatro.