At the A1 level, you only need to know that 'cento' is used for numbers like 101 (cento e um), 102 (cento e dois), etc. You use it when you are counting things beyond 100. It is a basic building block for telling the time (if using 24h format), talking about prices, or giving your address. Just remember: 100 = cem, but 100 + X = cento e X. This is one of the first 'irregular' rules you encounter in Portuguese numbers, but it is very consistent. You will also see it in 'por cento' when looking at discounts in shops.
At A2, you start using 'cento' in more varied contexts, such as describing quantities in recipes or small business transactions. You should be comfortable saying 'cento e cinquenta' (150) without hesitation. You also begin to recognize 'por cento' in weather reports (humidity) or simple news. You understand that 'cento' is a determiner that helps build larger numbers. You might also encounter the noun 'um cento' when buying food in bulk at a market, which is a common cultural experience in Lusophone countries.
At the B1 level, you use 'cento' fluently in compound numbers and percentages. You are expected to handle financial discussions, such as 'vinte por cento de desconto' (20% discount). You also start to notice the word in more idiomatic or collective senses, like 'centos de pessoas' (hundreds of people), although 'centenas' is also common. Your pronunciation should be clear, ensuring the 'o' at the end is slightly reduced (sounding like a soft 'u' in many dialects). You understand the syntactic requirement of the conjunction 'e' following 'cento'.
At B2, you understand the nuances between 'cento' and 'centena'. You use 'cento' correctly in complex statistical data and formal reports. You are aware that 'cento' can be used as a noun in specific commercial registers (e.g., 'venda por cento'). You can discuss economic trends using 'por cento' with precision. You also recognize the word in literature or more formal speeches where compound numbers are frequent. Your grasp of the 'cem' vs 'cento' rule is instinctive, and you can correct others or explain the rule simply.
At C1, you possess a deep understanding of the historical and stylistic reasons for the 'cem/cento' split. You can use 'cento' in sophisticated writing, perhaps using the collective noun form to add a specific 'flavor' to your prose (e.g., 'um cento de razões' to mean a myriad of reasons). You are familiar with regional variations in how 'cento' might be used in oral traditions or specific trades. You use percentages and compound numbers with the same ease as a native speaker, even in high-pressure environments like academic presentations or legal discussions.
At the C2 level, you have complete mastery. You can identify archaic uses of 'cento' in classical Portuguese literature (like Camões or Machado de Assis) where the rules might have been slightly more fluid or used for poetic meter. You understand the etymological journey from Latin 'centum' to the modern split. You can use 'cento' in puns, wordplay, or highly technical mathematical discourse. The distinction between 'cento' as a determiner and 'cento' as a noun is second nature, and you use both with perfect register awareness.

cento در ۳۰ ثانیه

  • Cento is the form of 100 used in compound numbers (101-199).
  • It is always used in the expression 'por cento' (percent).
  • As a noun, it means a set of 100 items (e.g., um cento de doces).
  • Never use 'cem' if followed by 'e' and another number.

The word cento is a fundamental numeral in the Portuguese language, serving as the specific form of the number one hundred when it is followed by another number or used in certain collective contexts. While the word cem is used for the exact quantity of 100, cento acts as the bridge for compound numbers ranging from 101 to 199. Understanding this distinction is a hallmark of early fluency in Portuguese.

Grammatical Category
Determiner / Numeral / Noun
Primary Function
Used to form compound numbers (101-199) and in percentages.
Morphological Origin
Derived from the Latin 'centum', maintaining the 't' in compound structures.

In everyday life, you will encounter cento every time you count beyond one hundred. It is not merely a mathematical term but a linguistic pivot point. For instance, if you are buying 105 items, you say cento e cinco. This rule is rigid; saying cem e cinco is considered a grammatical error in all dialects of Portuguese, from Lisbon to Luanda to São Paulo.

O livro tem cento e vinte páginas no total.

Example: The book has one hundred and twenty pages.

Beyond its role as a determiner, cento also functions as a masculine noun referring to a group of one hundred units, particularly common in commerce. When you go to a bakery in Brazil or Portugal, you might order a cento de salgadinhos (a hundred snacks). This collective usage is distinct from the simple numeral and highlights the word's versatility.

O preço subiu dez por cento este mês.

Existem cento e uma razões para aprender português.

Comprei um cento de ovos para a festa.

Ele correu cento e dez metros.

Usage in Math
Used in addition and multiplication contexts involving numbers 101-199.
Usage in Commerce
Refers to a wholesale unit of 100 pieces.

Using cento correctly requires understanding its relationship with the conjunction e (and). In Portuguese, compound numbers are linked by e, and cento is the required form of 100 in these sequences. This section explores the syntactic environments where cento thrives.

1. Compound Numerals (101-199)

When you want to express any number between 101 and 199, you must use cento followed by e and the subsequent number. This applies regardless of whether you are counting people, money, or abstract concepts.

  • 101: cento e um
  • 150: cento e cinquenta
  • 199: cento e noventa e nove
Rule of Thumb
If there is an 'e' after the hundred, use 'cento'.

2. Percentages

The term for 'percent' is por cento. This is a fixed expression. Even though it refers to 'per hundred', the word cem is never used in this specific locution. This is vital for business, statistics, and daily shopping.

A taxa de juros é de cinco por cento.

3. As a Collective Noun

In informal and commercial Portuguese, cento can be a noun. It is often used with the preposition de. For example, um cento de laranjas (a hundred oranges). This is particularly common in street markets (feiras) and when ordering party supplies.

You will encounter cento in almost every facet of Lusophone life. From the financial districts of Luanda to the beaches of Rio, the word is ubiquitous. Here are the most common environments:

In the Marketplace

When shopping, especially for items sold in bulk, cento is the standard unit. If you are organizing a 'festa de aniversário' (birthday party), you will order centos de salgadinhos (hundreds of savory snacks). The vendor will ask, 'Quantos centos você quer?' (How many hundreds do you want?).

In News and Media

Financial news is saturated with the word cento because of percentages. Phrases like inflação de dez por cento (ten percent inflation) or crescimento de dois por cento (two percent growth) are daily occurrences in newspapers like 'Público' or 'Folha de S.Paulo'.

O PIB cresceu três por cento no último trimestre.

In Education

In classrooms, students learn to count and perform calculations. Teachers will say, 'Abram o livro na página cento e quatro' (Open the book to page 104). It is one of the first numeric distinctions children learn in school.

Common Setting
Supermarkets, Banks, Schools, Bakeries.
Frequency
Extremely High (Top 500 words).

Even intermediate learners often stumble on the cem vs. cento distinction. Avoiding these pitfalls will make your Portuguese sound much more natural.

Mistake 1: Using 'Cem' in Compound Numbers

The most frequent error is saying cem e um instead of cento e um. In Portuguese, cem is 'atomic'—it cannot be combined with other numbers using 'e'.

Mistake 2: Using 'Cento' Alone

Conversely, you cannot use cento to mean exactly 100 unless it's the collective noun. If someone asks how many people are there and there are exactly 100, you say cem.

Mistake 3: 'Por Cem'

Learners often translate 'percent' literally from other languages. In Portuguese, it is always por cento.

Confusion Source
Spanish uses 'ciento' similarly, but English 'hundred' doesn't change form, which confuses English speakers.

To fully master cento, it helps to see it within its linguistic family. Portuguese has several words related to the number 100, each with a specific nuance.

Cem
The cardinal number 100 used in isolation or before a noun (e.g., cem livros).
Centena
A noun meaning 'a hundred' or 'a century' (in some contexts), often used for counting hundreds (e.g., duas centenas).
Centésimo
The ordinal number 'hundredth'.
Centavo
One hundredth of a currency unit (cent).
Centenário
Centenary; relating to a 100-year period.

While centena and cento both refer to a group of 100, cento is more common in informal commerce, while centena is more formal or mathematical. You would say uma centena de manifestantes (a hundred protesters) in a news report, but um cento de coxinhas at a snack bar.

Este é o centésimo aniversário da cidade.

چقدر رسمی است؟

سطح دشواری

گرامر لازم

Cardinal numbers

Compound numerals

Preposition 'por' with numerals

Collective nouns

مثال‌ها بر اساس سطح

1

Eu tenho cento e cinco reais.

I have 105 reais.

Use 'cento' because it's followed by 'e cinco'.

2

O ônibus número cento e dez chegou.

Bus number 110 arrived.

Numbers of buses or rooms use 'cento' if they are 101-199.

3

Cento e dois, cento e três...

102, 103...

Basic counting sequence.

4

A página cento e um é importante.

Page 101 is important.

Ordinal use in page numbers.

5

Cento e vinte minutos.

120 minutes.

Compound number for time.

6

Ela mora no número cento e sete.

She lives at number 107.

Address numbering.

7

Cento e quatro crianças.

104 children.

Counting people.

8

Dez por cento de desconto.

10 percent discount.

Fixed expression 'por cento'.

1

O bolo custa cento e cinquenta meticais.

The cake costs 150 meticais.

Currency in Mozambique.

2

Quero um cento de salgadinhos.

I want a hundred snacks.

'Cento' as a collective noun.

3

Há cento e quarenta alunos na escola.

There are 140 students in the school.

Quantifying a group.

4

O hotel tem cento e trinta quartos.

The hotel has 130 rooms.

Compound number.

5

Vinte por cento da turma faltou.

20 percent of the class was absent.

Percentage usage.

6

Cento e sessenta gramas de açúcar.

160 grams of sugar.

Measurements.

7

Ele pesa cento e dois quilos.

He weighs 102 kilos.

Body weight.

8

Cento e oitenta dias de garantia.

180 days of warranty.

Time duration.

1

A inflação subiu um por cento.

Inflation rose by one percent.

Economic context.

2

Comprei dois centos de doces para o batizado.

I bought two hundred sweets for the christening.

Plural noun 'centos'.

3

O carro está a cento e vinte quilómetros por hora.

The car is at 120 km/h.

Speed measurement.

4

Cento e noventa pessoas assinaram a petição.

190 people signed the petition.

Formal counting.

5

A probabilidade é de noventa por cento.

The probability is 90 percent.

Probability.

6

Ele já leu cento e doze livros este ano.

He has already read 112 books this year.

Compound number.

7

O apartamento mede cento e dez metros quadrados.

The apartment measures 110 square meters.

Area measurement.

8

Cento e quarenta e cinco euros, por favor.

145 euros, please.

Complex price.

1

Apenas dez por cento dos lucros foram reinvestidos.

Only ten percent of profits were reinvested.

Business terminology.

2

O evento reuniu cento e oitenta especialistas.

The event gathered 180 specialists.

Formal reporting.

3

O preço do cento de tijolos aumentou.

The price of a hundred bricks increased.

Industrial/Commercial noun.

4

Cento e setenta e cinco países ratificaram o acordo.

175 countries ratified the agreement.

International relations.

5

A bateria está em cento por cento.

The battery is at 100 percent.

Idiomatic '100%'.

6

Ele pagou cento e trinta e seis mil kwanzas.

He paid 136,000 kwanzas.

Large compound numbers.

7

Cento e sessenta e quatro degraus até o topo.

164 steps to the top.

Precise counting.

8

O desconto de quinze por cento é tentador.

The 15 percent discount is tempting.

Marketing context.

1

Cento e noventa e oito milímetros de chuva.

198 millimeters of rain.

Scientific measurement.

2

A obra contém cento e doze gravuras originais.

The work contains 112 original engravings.

Academic/Artistic description.

3

Vendeu-se o cento de ovos por um preço irrisório.

The hundred eggs were sold for a derisory price.

Literary register.

4

Cento e trinta e dois anos de história.

132 years of history.

Historical duration.

5

A taxa de juros subiu zero vírgula cinco por cento.

The interest rate rose 0.5 percent.

Decimal percentage.

6

Cento e cinquenta e quatro sonetos de Shakespeare.

154 sonnets by Shakespeare.

Literary reference.

7

O navio transportava cento e noventa passageiros.

The ship carried 190 passengers.

Formal narrative.

8

Cento e vinte e cinco mil pessoas na manifestação.

125,000 people in the demonstration.

Large scale quantification.

1

A precisão do relógio é de cem por cento.

The clock's precision is 100 percent.

Note: 'Cem por cento' is used for exactly 100%.

2

Cento e noventa e nove: o limite do impossível.

199: the limit of the impossible.

Philosophical usage.

3

O autor discorre sobre o cento de problemas da época.

The author discusses the hundred problems of the era.

Metaphorical collective noun.

4

Cento e sessenta e oito horas de pura agonia.

168 hours of pure agony.

Intense narrative style.

5

A variação de um por cento pode ser catastrófica.

A one percent variation can be catastrophic.

Precision in science.

6

Cento e quarenta e sete: um número primo?

147: a prime number?

Mathematical inquiry.

7

O custo por cento de produção deve ser reduzido.

The cost per hundred of production must be reduced.

Industrial economics.

8

Cento e doze: a sinfonia inacabada.

112: the unfinished symphony.

Cultural reference.

ترکیب‌های رایج

Por cento
Cento e um
Um cento de
Dois centos
Cento e poucos
Cento e tantos
Preço por cento
Cento e vinte
Cento e cinquenta
Cento e noventa

اغلب اشتباه گرفته می‌شود با

cento vs Cem

cento vs Sinto (I feel)

cento vs Cinto (Belt)

به‌راحتی اشتباه گرفته می‌شود

cento vs Cem

Used only for exactly 100.

cento vs Cinto

Means 'belt', pronounced similarly.

cento vs Sinto

Means 'I feel', pronounced the same.

الگوهای جمله‌سازی

خانواده کلمه

مرتبط

centena
centésimo
centavo
centenário
centuplicar

نحوه استفاده

cem vs cento

Cem is for 100 exactly. Cento is for 101-199 and percentages.

اشتباهات رایج
  • Saying 'cem e dois'.
  • Writing 'por cem' instead of 'por cento'.
  • Using 'cento' for exactly 100 items (e.g., 'Tenho cento livros').
  • Confusing 'cento' with the verb 'sentar' (to sit).
  • Misspelling it as 'sento'.

نکات

The 'E' Connection

Whenever you see the word 'e' after 100, use 'cento'.

Party Planning

Order snacks by the 'cento' in Brazil.

Percentages

Always use 'por cento' for statistics.

Don't confuse with Cinto

Cento is a number; Cinto is a belt.

Soft 'U'

The final 'o' sounds like 'u'.

Addition

100 + 5 = cento e cinco.

Page Numbers

Page 101 is 'página cento e uma' (if page is feminine).

Prices

110 reais = cento e dez reais.

Minutes

120 minutes = cento e vinte minutos.

Consistency

The rule never changes for 101-199.

حفظ کنید

ریشه کلمه

Latin

بافت فرهنگی

Used heavily in street food culture.

Standard in formal and informal counting.

تمرین در زندگی واقعی

موقعیت‌های واقعی

شروع‌کننده‌های مکالمه

"Quanto custa um cento de brigadeiros?"

"Você sabia que cento e um é um número primo?"

"A bateria do seu celular está em quantos por cento?"

"Qual é a página cento e dois do livro?"

"Você mora no número cento e quanto?"

موضوعات نگارش

Escreva sobre algo que você faria se tivesse cento e um anos.

Descreva uma festa onde você precisou comprar um cento de algo.

Como você se sente quando seu celular tem apenas um por cento de bateria?

Liste cento e uma coisas que você ama.

Explique a importância de dez por cento de algo na sua vida.

سوالات متداول

10 سوال

No, it is always 'cento e um'.

Yes, it can be a noun meaning a group of 100.

You say 'cem por cento'.

Yes, it is standard in all Portuguese-speaking countries.

Yes, 'centos', used when referring to multiple groups of 100.

It's an etymological remnant from Latin 'centum'.

No, 200 is 'duzentos'.

Yes, e.g., 'ano cento e dez'.

It means 'percent'.

It is masculine (o cento).

خودت رو بسنج 180 سوال

/ 180 درست

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