cardinal number
The term 'número cardinal' in Spanish is translated as 'cardinal number' in English. This refers to numbers used in counting (as in 'uno, dos, tres', etc.), which express quantity. For example, the cardinal numbers in English are one, two, three, and so on, used for denoting quantity in the abstract. They are fundamentally descriptive and are used to convey 'how many'. They are different from ordinal numbers, which represent position or rank in a sequential order.
My favorite cardinal number is five.
In this sentence, the term 'número cardinal' is used to refer to a type of number. Cardinal numbers (números cardinales) are the most common type of numbers and they're used in counting (e.g., one, two, three etc.). The speaker is saying that out of all the cardinal numbers, five is their favorite.
The first rule of mathematics is knowing the cardinal numbers.
This phrase emphasizes on the importance of cardinal numbers (números cardinales) in mathematics. In fact, understanding cardinal numbers is foundational to understand more advanced mathematical concepts.
Cardinal numbers go from zero to infinity.
This sentence is explaining the range of cardinal numbers (números cardinales). In mathematics, cardinal numbers can be any number from zero to infinity.