El precio/valor es 10
precio
cuanto vale?
diez
In Spanish, you would say "Mañana es 10 de septiembre." This sentence translates directly to "Tomorrow is September 10."
In competition means "premio". In sales means "precio".
Tengo diez años
Cena para diez
If you are asking how you say 18 in Spanish, it is said like one would say "10 and 8" in Spanish (Diez y Ocho) but spelled differently Dieciocho.
Tienes deiz años.
cinco-veinte-diez
My name is _____. = me llamo _____.I am 10 = tengo diez años
Ella tiene diez años. (literally, She has 10 years)