Numbers in English 

Numbers in English: Cardinal and Ordinal (http://www.englisch-hilfen.de/en/grammar/zahlen.htm)

Cardinal and ordinal numbers with pronunciation (http://www.ompersonal.com.ar/omexpress/numerosymedidas/numeroscardinalesyordinales.htm)

Study numbers (http://eolf.univ-fcomte.fr/uploads/ressources/grammar/10_numbers%20-dates/05a_cardinal_numbers/12.htm)

Cardinal and ordinal numbers: matching exercise (http://www.englisch-hilfen.de/en/exercises/numbers/index.php)

Crossword with numbers (http://www.englisch-hilfen.de/en/exercises/various/crossword_numbers4.htm)