21 twenty-one
31 thirty-one
41 forty-one
51 fifty-one
61 sixty-one
71 seventy-one
81 eighty-one
91 ninety-one
由此可见,60以后都是原来的十位数后面+ty,几十几就是几十+one-nine
21 twenty-one
31 thirty-one
41 forty-one
51 fifty-one
61 sixty-one
71 seventy-one
81 eighty-one
91 ninety-one
由此可见,60以后都是原来的十位数后面+ty,几十几就是几十+one-nine