一、英語基數詞從 21——99依次為：twenty-one twenty-two twenty-three twenty-four twenty-five twenty-six twenty-seven twenty-eight twenty-nine thirty thirty-one thirty-two thirty-three thirty-four thirty-five thirty-six thirty-seven thirty-eight thirty-nine forty forty-one forty-two forty-three forty-four forty-five forty-six forty-seven forty-eight forty-nine fifty fifty-one fifty-two fifty-three fifty-four fifty-five fifty-six fifty-seven fifty-eight fifty-nine sixty sixty-one sixty-two sixty-three sixty-four sixty-five sixty-six sixty-seven sixty-eight sixty-nine seventy seventy-one seventy-two seventy-three seventy-four seventy-five seventy-six seventy-seven seventy-eight seventy-nine eighty eighty-one eighty-two eighty-three eighty-four eighty-five eighty-six eighty-seven eighty-eight eighty-nine ninety ninety-one ninety-two ninety-three ninety-four ninety-five ninety-six ninety-seven ninety-eight ninety-nine
注：整數幾十中除twenty，thirty, forty，fifty，eighty為特殊形式外，sixty，seventy，ninety都是其個位數形式后添加后綴-ty構成。表示幾十幾時，在幾十和個位基數詞形式之間添加連字符“-”

二、小數表示法
1. 小數用基數詞來表示，以小數點為界，小數點左首的數字為一個單位，表示整數，數字合起來讀；小數點右首的數字為一個單位，表示小數，數字分開來讀；小數點讀作 point，o讀作 zero或o〔ou〕，整數部分為零時，可以省略不讀。例如：
0.4 zero point four或point four 零點四
10.23 ten point two three 十點二三
25.67 twenty-five point six seven 二十五點六七
l.03 one point o three 一點零三
2. 當數字值大于1時，小數后面的名詞用復數，數字值小于1時，小數后面的名詞用單數。
1.03 meters 一點零三米 0.49 ton 零點四九噸
l.5 tons 一點五噸