Age -- uses special numbers for 20, 30, ... which are not (?) used elsewhere, but are very important to know.
Time -- required for practicing saying the time using both Sino- and Korean numbers
Large numbers -- due to reliance on the 10,000 based counting saying large numbers in Korean (million, 10 millions, billion, etc) requires practice to get the hang of.
The exercises are missing few important topics:
Age-- uses special numbers for 20, 30, ... which are not (?) used elsewhere, but are very important to know.Time-- required for practicing saying the time using both Sino- and Korean numbersLarge numbers-- due to reliance on the 10,000 based counting saying large numbers in Korean (million, 10 millions, billion, etc) requires practice to get the hang of.