If you are learning French, you probably felt confident with numbers from 1 to 69... and then suddenly French decided to become a little more creative.
Why does 70 become soixante-dix (sixty-ten)? Why is 80 quatre-vingts (four-twenties)? And why does 90 become quatre-vingt-dix (four-twenty-ten)?
The good news: French numbers are not random. There is actually a simple pattern. Once you understand the logic, numbers from 70 to 99 become much easier.
The secret: French does not restart at 70
In English, we think:
70 = seventy
80 = eighty
90 = ninety
French thinks differently. Instead of creating completely new words, French continues counting using combinations.
The first cheat code: 70 is 60 + 10
French uses soixante (60) and adds numbers after it.
Think:
70 = 60 + 10
So:
- 70 = soixante-dix
- 71 = soixante et onze
- 72 = soixante-douze
- 75 = soixante-quinze
- 79 = soixante-dix-neuf
Do not memorize 70, 71, 72 separately. Your brain should see:
60 + the number you need.
The second cheat code: 80 is four times twenty
This is the number that surprises almost every beginner.
French uses:
quatre-vingts = four twenties = 80
Imagine four groups of twenty:
20 + 20 + 20 + 20 = 80
Now continue:
- 80 = quatre-vingts
- 81 = quatre-vingt-un
- 82 = quatre-vingt-deux
- 85 = quatre-vingt-cinq
- 89 = quatre-vingt-neuf
Important detail: the final s disappears when another number follows.
Example:
80 → quatre-vingts
81 → quatre-vingt-un
The third cheat code: 90 is 80 + 10
Once you understand 80, 90 becomes easy.
French simply adds ten:
90 = 80 + 10
- 90 = quatre-vingt-dix
- 91 = quatre-vingt-onze
- 92 = quatre-vingt-douze
- 95 = quatre-vingt-quinze
- 99 = quatre-vingt-dix-neuf
The visual memory trick
Instead of thinking about numbers, imagine three blocks:
Block 1: 70s
60 + extra numbers
soixante + number
Block 2: 80s
Four twenties
quatre × vingt
Block 3: 90s
Four twenties + extra numbers
quatre-vingt + number
Quick comparison table
| Number | French logic | French |
|---|---|---|
| 70 | 60 + 10 | soixante-dix |
| 75 | 60 + 15 | soixante-quinze |
| 80 | 4 × 20 | quatre-vingts |
| 85 | 80 + 5 | quatre-vingt-cinq |
| 90 | 80 + 10 | quatre-vingt-dix |
| 99 | 80 + 19 | quatre-vingt-dix-neuf |
Common mistakes beginners make
- Trying to translate English numbers directly.
- Saying septante instead of soixante-dix in standard French exams.
- Forgetting that quatre-vingts loses the s before another number.
- Trying to memorize without understanding the pattern.
Practice challenge
Try translating these numbers:
- 73
- 88
- 94
- 67
- 79
Write your answers and compare with the correct French forms.
Want to master French numbers faster?
The secret is not memorizing hundreds of words. It is recognizing patterns and practicing them regularly.
Practice with real French exercises and build your confidence step by step.
Participez dans les commentaires
💬 Which French number is the most confusing for you?
💬 Did you find the 70-99 pattern easier after this explanation?
💬 Write three French numbers in the comments and practice together.