53的基数词和序数词怎么写

53用英语表达就是fifty -three，中间有一道连字符，例如，there are fifty- three students in our class，我们班有53个学生，Fifty three的序数词是Fifty third，整数的fifty不变，只把three变为相对应的序数词Third，例如WHO was the fifty three to arrive at our classroom this morning，谁是我们班今天早上到达的第53个学生