Observez:
http://orthonet.sdv.fr/pages/lex_nombres.html
Exercices:
1. http://www.education.vic.gov.au/languagesonline/french/sect25/no_09/no_09.htm
2. http://www.education.vic.gov.au/languagesonline/french/sect25/no_02/no_02.htm
3. http://wims.unice.fr/wims/wims.cgi?lang=fr&module=Lang/francais/oefnumber.fr/
4. http://mathenpoche.sesamath.net/6eme/pages/numerique/chap1/serie1/exo7/exo7.htm
5. http://kzofrancais.pbworks.com/f/1_mots_crois%C3%A9s_nombres_de_0_%C3%A0_100.htm
6. http://people.wku.edu/nathan.love/101-102/interact101-102/r-p_u02_quel_age.htm
7. http://uregina.ca/~laninstit/HotPot/French/Elementaire/exercises/N/n011.htm