10. Numerals

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Cardinal Numerals

one	two	three	four	five	six	seven	eight	nine	ten
eleven	twelve	thirteen	fourteen	fifteen	sixteen	seventeen	eighteen	nineteen	twenty
twenty-one	twenty-two	twenty-three
thirty-one
forty-one
fifty-one
sixty-one
seventy-one
eighty-one
ninety-one
a/one hundred

个-》十几-》几十

• three->thir teen->thir ty;

• one->eleven->ten

• two->twelve->twen ty

• four->four teen->for ty

• five->fif teen->fif ty

• eight->eight een->eight y

• one thousand:1,000

• one million: 1,000,000

• one billion: 1,000,000,000

以上为基本单位

1. 十位和个位之间用连字符连接
2. 百位和十位之间用 and 连接：750 seven hundred and fifty
3. 千位和百位之间无连接符号 或 用 and：1200 one thousand two hundred; 1432 one thousand four hundred and thirty-two
   1001 one thousand and one
4. 每三位进一位（新的单位计算），每个基本单位的最大计量是 999 nine hundred and ninety-nine
5. 不同的基本单位之间用 ， 连接(million, billion)
   234,407: two hundred and thirty-four thousand, four hundred and seven
   3,089,342: three million, eighty-nine thousand, three hundred and forty-two
6. 大于1时基本单位不需要变为复数：two hundred
7. 基数词的复数 + of 表示不确定数目：

• hundreds of: 大几百，好几百
• thousands of: 大几千

Ordinal Numerals

first / 1st	second / 2nd	third / 3rd
fourth / 4th	fifth / 5th	sixth / 6th	seventh / 7th	eighth / 8th	ninth / 9th
tenth / 10th	eleventh / 11th	twelfth / 12th	thirteenth / 13th	fourteenth / 14th	fifteenth / 15th
sixteenth / 16th	seventeenth / 17th	eighteenth / 18th	nineteenth / 19th

• twentieth / 20th
• thirtieth / 30th
• fortieth / 40th
• fiftieth / 50th
• sixtieth / 60th
• seventieth / 70th
• eightieth / 80th
• ninetieth / 90th

Fractions

numerator/denominator

3种表示方法：

1. a(one)half:1/2
   numerator: cardinal numerals
   denominator: ordinal numerals

• 1/3: a(one) third
• 1/4: a(one) quarter/a (one) fourth
• 2/3: two thirds

2. one over/by five:1/5
   numerator, denominator: cardinal numerals

• 1/100: one over a hundred/one by one hundred

3. one divided by ten:1/10
   numerator, denominator: cardinal numerals

• 25/100: twenty-five divided by one hundred

对于整数+分数（带分数）：

Decimals

Percentages