20 – i ship (이십)

30 – sam ship (삼십)

40 – sa ship (사십)

50 – o ship (오십)

60 – yuk ship (육십)

70 – chil ship (칠십)

80 – pal ship (팔십)

90 – gu ship (구십)

100 – bek (백)

200 – i bek (이백)

300 – sam bek (삼백)

For numbers 20 – 90, it’s the # plus 10. Ex: 20 = two (이) + ten (십). To say something like 24 (이십사), it’s 20 (이십) + 4 (사). 100 is just bek (). It’s not il bek, but just bek. However from 200 – 900, it’s the # plus 100. For example, 300 (삼백) = 3 (삼) + 100 (백).