Depending on your level you could study:
Numbers 21 - 31
Numbers 32 - 1000.
Now you can listen to the pronunciation of the numbers.
To practise what you've learnt you could try some online exercises but if you want to have fun with numbers then try this game where you have to zap some numbers to gain a high score.
Use numbers in context with this listening exercise where you have to fill in ages, house numbers and telephone numbers.