I have a Korean number course built. I just need the audio added.
I don’t think there are any Horean speakers.
Try this website! https://forvo.com/
It could get a bit tedious to download word after word of pronunciations for a whole course, but if you can’t find a native speaker, it’s a good option!
If you want to download Korean sounds use google text to speech using these words
Korean Numbers.
Korean numbers are actually very easy once you get the hang of them. But, because they are so different from English numbers, it is often hard for English speakers to fully understand them at first.
First thing you need to know, there are two sets of numbers in Korean: The pure Korean numbers and the numbers derived from Chinese (called SinoKorean numbers). Let’s look at the SinoKorean numbers first, because they are easier:
SinoKorean Numbers.
These are the SinoKorean numbers as provided in Vocabulary:
일 = one
이 = two
삼 = three
사 = four
오 = five
육 = six
칠 = seven
팔 = eight
구 = nine
십 = ten
백 = one hundred
천 = one thousand
만 = ten thousand
With only those numbers, you can create any number from 1 – 10 million. All you need to do is put them together:
일 = one (1)
십 = ten (10)
십일 = eleven (10 + 1)
이십 = twenty (2 x 10)
이십일 = twenty one (2 x 10 + 1)
이십이 = twenty two (2 x 10 + 2)
백 = one hundred (100)
백일 = one hundred and one (100 + 1)
백이 = one hundred and two (100 + 2)
백구십 = one hundred and ninety (100 + 90)
구백 = nine hundred (9 x 100)
천 = one thousand (1000)
천구백 = one thousand nine hundred (1000 + 9 x 100)
오천 = five thousand (5 x 1000)
오천육백 = five thousand six hundred (5 x 1000 + 6 x 100)
만 = ten thousand
십만 = one hundred thousand
백만 = one million
천만 = ten million
The SinoKorean numbers are used in limited situations. As each of these are taught throughout the upcoming lessons, you will slowly learn when to use the SinoKorean numbers over the Korean numbers. For now, don’t worry about memorizing when they should be used, as it will come naturally.

When counting/dealing with money

When measuring

When doing math

In phone
numbers

When talking about/counting time in any way except the hour

The names of each month

Counting months (there is another way to count months using pure Korean numbers)
Pure Korean Numbers.
These are the pure Korean numbers as provided in the Vocabulary:
하나 = one
둘 = two
셋 = three
넷 = four
다섯 = five
여섯 = six
일곱 = seven
여덟 = eight
아홉 = nine
열 = ten
스물 = twenty
서른 = thirty
마흔 = forty
쉰 = fifty
Creating numbers 1119, 2129, 3139 (etc…) is easy, and is done like this:
11: 열 하나 (10 + 1)
12: 열 둘 (10 + 2)
21: 스물 하나 (20 + 1)
59: 쉰 아홉 (5 + 9)
After 60, regardless of what you are doing, pure Korean numbers are rarely used.
The pure Korean numbers are used when:

You are counting things/people/actions

Talking about the hour in time

Sometimes used when talking about months.
Again, don’t worry about memorizing each of those yet. Whenever I talk about numbers, I will tell you which set you are expected to use.
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