Native Korean Numbers + Audio
In this deck you will find a variety of numbers with their pronunciation for you to practice.
I recommend putting the "Interval Modifier" in the "Review" section to 50% so the repetitions are not that spaced, since it is just audio and a bit of text, it shouldn't make too much time every day.
This is, again, to make the response you have to Korean numbers as fast as it can be, reaching something similar to what you do in your native language
I hope you find it useful.