Chinese Numbers 10 – 100 : Read for practice!

21 二十一 èrshíyī

63 六十三 liùshísān

22 二十二 èrshíèr

64 六十四 liùshísì

More information on the Chinese numbers you can find in The Chinese Numerals for Businessmen by Polina Shinkina http://www.lulu.com/content/e-book/the-chinese-numerals-for-businessmen/19124210 or in each Chinese textbook by Polina Shinkina on http://www.lulu.com/spotlight/polina985