Start with the numbers that appear in everyday life: zero, one, two, three, four, five, six, seven, eight, nine, ten. Then come eleven, twelve, thirteen, fourteen, fifteen, sixteen, seventeen, eighteen, nineteen and twenty. With them you can count objects, say your age or understand a simple quantity in a store. When you see a list of products, a table with chairs, or a page with exercises, identify first the digit and then say the number out loud. If the number appears before a noun, the meaning is usually that of quantity, as in three books or twenty euros. To listen to and say quantities more easily, it is also worthwhile to know the Nominal Number, because many numbers function as nouns in expressions of quantity.

The most useful tens are twenty, thirty, forty, fifty, sixty, seventy, eighty and ninety. To form numbers between 21 and 99, join the ten with the unit: twenty-one, twenty-two, twenty-three; then thirty-one, forty-five, sixty-eight. In writing, the connection between ten and unit changes depending on the form of the number, but the idea is always the same: first the ten, then the unit. This way you can read prices like thirty-two euros, ages like twenty-seven years, or quantities like eighty-four people. These forms also serve for the Numeral Adjectives and for the Numeral Pronouns, because the numeric base is the same.

Formation of tens and quantities

Idea
The decena diez serves as the base to build many new quantities.
To say a larger quantity, the unit is added after the tens.
Treinta starts the series of tens and helps to keep counting.
Cuarenta is useful when you count big things and many at once.
Cincuenta marks another important ten in the count.
Sesenta appears a lot in clocks, ages and long quantities.
Setenta can sound solemn, but it’s still just another ten.
Ochenta is used for large and round quantities.
Noventa closes the staircase before reaching one hundred.

Numbers appear in very concrete phrases: it costs fifteen euros, the menu costs twelve euros, I am twenty-five years old, call me at six seven eight…. In prices, the number is usually next to the currency; in age, it goes with years; in phones, each digit is spoken separately. When you see a quantity written in digits, like 18 or 47, you can convert it into words and say it naturally. When you find it written with letters, like dieciocho or cuarenta y siete, you can read it without stopping. In shopping lists, in a reservation, or in a sale sign, recognizing whether the number indicates price, quantity, age, or a phone number helps avoid confusion and lets you respond with a complete sentence.

EdadCifraFacturaHorarioPrecioCantidadTeléfonoNúmero escritoCambioMenú

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Es la medida de cuánto hay de algoEs un signo numérico que forma parte de un númeroEs la lista de comidas y sus números en un restauranteEs la cantidad de dinero que cuesta algoEs el número de años que tiene una persona o un animalEs el papel con números de pago de una compra o servicioEs la forma con letras de una cantidadEs la información de las horas en que pasa algoEs el dinero que recibes de vuelta después de pagarEs el número para llamar a alguien

Useful numbers in everyday situations

Word	Definition
Precio	It is the amount of money that something costs.
Menú	It is the list of meals and their numbers in a restaurant.
Horario	It is the information of the hours when something happens.
Edad	It is the number of years that a person or animal has.
Teléfono	It is the number to call someone.
Cifra	It is an numeric sign that forms part of a number.
Número escrito	It is the written-out form of a quantity.
Cambio	It is the money you get back after paying.
Cantidad	It is the measure of how much there is of something.
Factura	It is the paper with payment numbers of a purchase or service.

Scramble

Dates use numbers to indicate day, year, and sometimes floor or door in an address. You can read el 3 de mayo, el 12 de octubre or 2026 without separating each part in the same way. In an address, the number usually indicates the house, building, or floor: calle Mayor 14, avenida Central 8, tercero derecha. Notices also mix numbers and words: rebajas del 50%, plaza 2, puerta 7, entrada a las 19:30. In these contexts, the number not only counts; it organizes practical information. That is why it helps to pay attention to the accompanying word to know whether it indicates date, place, time, or price. When later forms that function as Numeral Adjectives appear, you’ll see that many of these combinations follow the same order.

Reading numbers in everyday notices

Idea
In a date, the day number is read as ordinal or cardinal depending on context.
In an address, the number identifies the exact place.
In a notice, numbers draw attention to a time or a date.
When you see a floor or level, the number indicates level or location.
On a door, the number serves to find a room.
On a sign, the number can mark speed, distance or limit.
In a list, the numbers help to follow the order.
In a long date, day, month and year are said clearly.

When saying numbers, pronounce each syllable clearly: dieciséis, diecisiete, dieciocho, diecinueve and veintidós usually require more attention than uno or diez. In slow conversation, listen to the full word and not just the first part. In real speech, a person may say a string of digits quickly, especially in phones, codes, schedules or addresses. If you hear treinta y seis, mentally separate the ten from the unit; if you hear ciento veinte, first look for the larger part. In some places there are slight differences in rhythm or pronunciation, but the structure of the number remains the same. Practicing aloud and with attentive listening prepares you to understand numbers when they appear isolated or inside sentences with Numeral Pronouns.

Sounds and rhythm when saying numbers

Word	Notation	Description	Example
cinco	ˈsiŋko	The n approaches the sound of ng before the c and that’s why it sounds more nasal.	Digo cinco con una nariz muy orgullosa.I say five with a very proud nose.
veinticinco	beɪntiˈθiŋko	In many areas, the sequence cin sounds nasal and the word is said with a fast rhythm.	Escucho veinticinco sin perder la sonrisa.I hear twenty-five without losing the smile.
cincuenta	siŋˈkwenta	The combination cuen sounds joined and the word carries the stress on the strong syllable.	Pronuncio cincuenta como si llevara un sombrero elegante.I pronounce fifty as if it wore an elegant hat.
setenta	seˈtenta	The word has a regular rhythm and the stressed syllable falls on ten.	Repito setenta mientras camino como robot amable.I repeat seventy while walking like a friendly robot.
noventa	noˈβenta	The v sounds soft and the strong syllable is ven.	Digo noventa con una voz muy tranquila.I say ninety with a very calm voice.
cien	θjen	The word is brief and clear, with a soft start and an open vowel.	Escucho cien y pienso en una montaña de calcetines.I hear hundred and think of a mountain of socks.