Écrivez les nombres en lettres (Write the numbers in words - 0 to 10,000) Rules and shortcuts to remember numbers: 1. Know the multiples of 10 (10, 20, 30, 40, 50, 60, 70, 80, 90 and 100) by-heart. Without knowing the multiples of 10, you cannot go from one multiple of 10 to the next because the same word will be used. 10 – dix, 20 – vingt, 30 – trente, 40 – quarante, 50 – cinquante, 60 – soixante, 70 – soixante-dix, 80 – quatre-vingts, 90 – quatre-vingt-dix, 100 – cent So, for example, 21 to 29 will be : vingt et un, vingt-deux, vingt trois, vingt-quatre, vingt-cinq, vingt-six, vingt-sept, vingt-huit, vingt-neuf and 31 to 39 will be : trente et un, trente-deux, trente-trois, trente-quatre….and so on till trente-neuf. 2. For numbers 21, 31, 41, 51, 61 and 71 , the word ‘et’ is used but no hyphen. 21 – vingt et un, 31 – trente et un, 41 – quarante et un, 51 – cinquante et un, 61 – soixante et un, 71 – soixante et onze 3. The numbers 70, 80 a...