Numbers 1–100

Exercises preview

1. Exercise 1

   matching
   • 3→three
   • 13→thirteen
   • 30→thirty

   Watch the -teen vs. -ty pattern: thirTEEN (13) is stressed on the end, THIRty (30) on the start.

   🇧🇷 Diferença-chave: 13 tem ênfase no final (-teen), 30 no começo (-ty).

2. Exercise 2

   multiple choice

   How do you say 21 in English?

   • twenty and one
   • twenty-oneanswer
   • two ten one
   • twentyone

   Two-digit numbers above 20 use a hyphen: twenty-one, thirty-two, forty-five.

   🇧🇷 Use hífen entre a dezena e a unidade: twenty-one, forty-three.

3. Exercise 3

   fill blank

   40 is 'forty'. 50 is '___'.

   fifty = 50. Note: it's 'fifty' not 'fivety'.

   🇧🇷 50 = fifty (não 'fivety'!).

4. Exercise 4

   multiple choice

   Someone asks 'How old are you?' — a natural reply is:

   • I have 25 years
   • I am 25 years oldanswer
   • My age is 25
   • 25 years

   English uses BE for age: 'I AM 25 years old'. Not 'I have 25 years' (that's Portuguese/French structure).

   🇧🇷 Cuidado: em inglês usa-se 'to be' (I AM 25), não 'to have'.

5. Exercise 5

   fill blank

   The next number: 70, 80, ___.

   70 = seventy, 80 = eighty, 90 = ninety.

   🇧🇷 90 = ninety (escreva com 'ni' — sem 'y' no lugar do 'i').

6. Exercise 6

   multiple choice

   Your phone number ends in 007. How would you say it out loud?

   • seven
   • double-zero seven
   • zero zero seven
   • All three are natural in different contextsanswer

   For phone numbers, digits are said one by one. 'Double-zero' is common in the UK, 'zero zero' in the US, and British English also says 'oh' /oʊ/ for zero.

   🇧🇷 Em números de telefone, cada dígito é dito separadamente.

7. Exercise 7

   matching
   • 12→twelve
   • 20→twenty
   • 100→one hundred

   Three 'landmarks' worth memorizing exactly — they don't follow the normal pattern.

   🇧🇷 Números irregulares que é melhor decorar: twelve (12), twenty (20), one hundred (100).