Fiche à imprimer : Les grands nombres, les fractions et les pourcentages en anglais

Les grands nombres

Nombre	En anglais
100	a hundred / one hundred
250	two hundred and fifty
1,000	a thousand
3,476	three thousand, four hundred and seventy-six
1,000,000	a million
2,500,000	two and a half million / two million five hundred thousand
1,000,000,000	a billion (un milliard)

Trois règles : on met une virgule pour séparer les milliers (3,476), on dit and après hundred en anglais britannique, et hundred, thousand, million ne prennent pas de s après un nombre : two hundred (pas ~~two hundreds~~). Mais on dit hundreds of people (des centaines de personnes).

Les décimales

L'anglais utilise un point et non une virgule : 2.5 se lit two point five. Les chiffres après le point se lisent un par un : 3.14 = three point one four.

Les fractions

Fraction	En anglais
1/2	a half
1/3	a third
1/4	a quarter
3/4	three quarters
2/3	two thirds
1/10	a tenth

Les pourcentages

25 % se dit twenty-five per cent (en un ou deux mots). Pas d'espace avant le signe en anglais : 25%.

Half of the class has a dog. / Seventy per cent of the Earth is covered by water.

La moitié de la classe a un chien. / Soixante-dix pour cent de la Terre est recouverte d'eau.

Mise en situation : un exposé sur l'Inde

Teacher : How many people live in India?

Combien de personnes vivent en Inde ?

Inès : About one point four billion. That's more than a sixth of the world's population.

Environ un virgule quatre milliard. C'est plus d'un sixième de la population mondiale.

Teacher : Very good. And what percentage of Indians live in cities?

Très bien. Et quel pourcentage des Indiens vit en ville ?

Inès : Roughly thirty-five per cent. So about two thirds live in the countryside.

Environ trente-cinq pour cent. Donc à peu près deux tiers vivent à la campagne.

À retenir

3,476 : virgule pour les milliers ; hundred and... ; pas de s après un nombre (two hundred).
a billion = un milliard ; 2.5 = two point five.
a half, a third, a quarter, three quarters, two thirds.
25% = twenty-five per cent.

Exercice 1 : Nombres, fractions, pourcentages : exercice 1 (QCM)

« 300 »
1. three hundred
2. three hundreds
3. three hundred of
« 1 000 000 000 »
1. a thousand million of
2. a billion
3. a milliard
« 2,5 » se lit...
1. two comma five
2. two point five
3. two and five
« 1/4 »
1. a fourth part
2. a quarter
3. a four
« 3/4 »
1. three quarter
2. three quarters
3. three fourths of
« 1/2 »
1. a middle
2. a demi
3. a half
« 2/3 »
1. two third
2. two threes
3. two thirds
« 50 % »
1. fifty per cents
2. fifty percents of
3. fifty per cent
« des centaines de personnes »
1. hundreds people
2. hundreds of people
3. hundred of people
« 250 » (anglais britannique)
1. two hundred fifties
2. two hundred and fifty
3. two hundreds fifty

Exercice 2 : Nombres, fractions, pourcentages : exercice 2 (à compléter)

There are three .......................... students in my school. (cent)
Paris has more than two .......................... inhabitants.
The world population is about eight .......................... . (milliards)
2.5 = two .......................... five.
A .......................... of an hour is fifteen minutes. (quart)
.......................... of the class is absent. (la moitié)
Two .......................... of the students passed. (tiers)
Ninety per .......................... of teenagers have a phone.
.......................... of people came to the concert. (des centaines)
1,500 = one thousand five .......................... .

Exercice 3 : Nombres, fractions, pourcentages : mise en situation

Tu dis qu'il y a 600 élèves dans ton collège.
1. There are six hundred of students in my school.
2. There are six hundreds students in my school.
3. There are six hundred students in my school.
Tu lis le prix : 2,50 £.
1. Two point fifty pounds of.
2. Two pounds fifty.
3. Two comma fifty pounds.
Tu dis que la moitié de ta classe a un chien.
1. A middle of my class has a dog.
2. Half of my class has a dog.
3. The half of my class has a dog.
Tu dis que 70 % de la Terre est recouverte d'eau.
1. Seventy per cents of the Earth is covered by water.
2. Seventy per cent of the Earth is covered by water.
3. Seventy percents of Earth is water of.
Tu dis que des milliers de personnes ont manifesté.
1. Thousands of people protested.
2. Thousand of people protested.
3. Thousands people protested.
Tu dis que l'Inde compte environ 1,4 milliard d'habitants.
1. India has about one comma four milliard people.
2. India has about one point four billion people.
3. India has about one point four billions people.
Tu dis que trois quarts des élèves ont réussi.
1. Three fourth of students passed.
2. Three quarters of the students passed.
3. Three quarter of the students passed.
Tu dis que l'entrée coûte 15 % de moins pour les étudiants.
1. It's fifteen per cents cheaper for students.
2. It's fifteen percent less cheap of students.
3. It's fifteen per cent cheaper for students.
Tu dis qu'il reste un tiers du gâteau.
1. A third of the cake is left.
2. The third part of cake rests.
3. A three of the cake is left.
Tu lis 4 500.
1. four thousand five hundred
2. four thousands five hundreds
3. four thousand and five hundreds

Corrigé

Exercice 1

1. a) three hundred · 2. b) a billion · 3. b) two point five · 4. b) a quarter · 5. b) three quarters · 6. c) a half · 7. c) two thirds · 8. c) fifty per cent · 9. b) hundreds of people · 10. b) two hundred and fifty

Exercice 2

1. hundred · 2. million · 3. billion · 4. point · 5. quarter · 6. Half · 7. thirds · 8. cent · 9. Hundreds · 10. hundred

Exercice 3

1. c) There are six hundred students in my school. · 2. b) Two pounds fifty. · 3. b) Half of my class has a dog. · 4. b) Seventy per cent of the Earth is covered by water. · 5. a) Thousands of people protested. · 6. b) India has about one point four billion people. · 7. b) Three quarters of the students passed. · 8. c) It's fifteen per cent cheaper for students. · 9. a) A third of the cake is left. · 10. a) four thousand five hundred