Counting to 100

contar to count
dos más dos two plus two
restar to subtract
sumar to add

Mi primo todavía no sabe contar a diez. My cousin can't count to ten yet.
Contemos a 100 de cinco en cinco. Let's count to 100 by fives.
El contar es la base de la matemática. Counting is the base of mathematics.

Counting to 100
11 once 25 veinticinco
12 doce 26 veintiséis
13 trece 27 veintisiete
14 catorze 28 veintiocho
15 quince 29 veintinueve
16 dieciséis 30 treinta
17 diecisiete 40 cuarenta
18 dieciocho 50 cincuenta
19 diecinueve 60 sesenta
20 veinte 70 setenta
21 veintiuno 80 ochenta
22 veintidós 90 noventa
23 veintitres 100 cien
24 veinticuatro

Notice that from 16 to 19, each number is a compound. In other words, to say 16, you say ten and six. In Spanish, diez means ten, and seis means six. The number 16, then, is composed of these two numbers, dieciséis. This same pattern is followed for the 20's. 20 is veinte; to say 21 you combine veinte and uno to make veintiuno.

Beginning with 31 this pattern changes; numbers are written as three separate words. For example, treinta y uno, cuarenta y dos, cincuenta y tres etc.