Decades are probably best referred to in the following manner: los (años)
sesenta‘the sixties’.Basic arithmetical calculationsThe verb seris used in the plural to mean ‘equals’:
Cinco y/más seis son once. 5 + 6 = 11.
Veinte menos trece son siete. 20 – 13 = 7.
Diez (multiplicado) por cuatro son cuarenta. 10 ×4 = 40.
Cien dividido por veinte son cinco. 100 ÷ 20 = 5.
Note: The division symbol in Spanish is :.Ordinal numbers
primer(o)/a 1 o/1a 1st
segundo/a 2 o/2a 2nd
tercer(o)/a 3 o/3a 3rd
cuarto/a 4 o/4a 4th
quinto/a 5 o/5a 5th
sexto/a 6 o/6a 6th
sé(p)timo/a 7 o/7a 7th
octavo/a 8 o/8a 8th
noveno/a 9 o/9a 9th
décimo/a 10 o/10a 10th
undécimo/a 11 o/11a 11th
duodécimo/a 12 o/12a 12th
décimo tercer(o)/a 13o/13a 13th
vigésimo/a 20 o/20a 20th23.2
23.1.5.31111
2 3 4 5 6 7 8 9
1011
1
12111
3 4 5 6 7 8 9
20111
1 2 3 4 5 6 7 8 9
30111
1 2 3 4 5 6 7 8 9
40
41111
23
Numerals and
numerical
expressions
244
Word order in datesWord order in Spanish is fixed as above and does not allow the
English alternatives, 28th March or March 28th.