Table of contents
1. Numbers in words in English
2. Types of numbers in English
Cardinal numbers
Ordinal numbers
Fractional numbers
Decimal numbers
3. Other types of numbers mostly used in mathematics
1. Numbers in words in English
The table below shows 1-100 numbers in English to help you learn how to write them in words. A printable is available to download for free.
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1- One 🔊
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2- Two 🔊
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3- Three 🔊
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4- Four 🔊
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5- Five 🔊
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6- Six 🔊
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7- Seven 🔊
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8- Eight 🔊
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9- Nine 🔊
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10- Ten 🔊
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11- Eleven 🔊
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12- Twelve 🔊
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13- Thirteen 🔊
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14- Fourteen 🔊
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15- Fifteen 🔊
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16- Sixteen 🔊
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17- Seventeen 🔊
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18- Eighteen 🔊
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19- Nineteen 🔊
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20- Twenty 🔊
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21- Twenty-one 🔊
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22- Twenty-two 🔊
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23- Twenty-three 🔊
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24- Twenty-four 🔊
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25- Twenty-five 🔊
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26- Twenty-six 🔊
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27- Twenty-seven 🔊
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28- Twenty-eight 🔊
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29- Twenty-nine 🔊
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30- Thirty 🔊
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31- Thirty-one 🔊
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32- Thirty-two 🔊
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33- Thirty-three 🔊
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34- Thirty-four 🔊
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35- Thirty-five 🔊
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36- Thirty-six 🔊
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37- Thirty-seven 🔊
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38- Thirty-eight 🔊
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39- Thirty-nine 🔊
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40- Forty 🔊
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41- Forty-one 🔊
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42- Forty-two 🔊
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43- Forty-three 🔊
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44- Forty-four 🔊
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45- Forty-five 🔊
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46- Forty-six 🔊
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47- Forty-seven 🔊
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48- Forty-eight 🔊
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49- Forty-nine 🔊
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50- Fifty 🔊
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51- Fifty-one 🔊
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52- Fifty-two 🔊
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53- Fifty-three 🔊
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54- Fifty-four 🔊
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55- Fifty-five 🔊
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56- Fifty-six 🔊
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57- Fifty-seven 🔊
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58- Fifty-eight 🔊
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59- Fifty-nine 🔊
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60- Sixty 🔊
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61- Sixty-one 🔊
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62- Sixty-two 🔊
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63- Sixty-three 🔊
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64- Sixty-four 🔊
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65- Sixty-five 🔊
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66- Sixty-six 🔊
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67- Sixty-seven 🔊
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68- Sixty-eight 🔊
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69- Sixty-nine 🔊
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70- Seventy 🔊
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71- Seventy-one 🔊
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72- Seventy-two 🔊
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73- Seventy-three 🔊
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74- Seventy-four 🔊
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75- Seventy-five 🔊
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76- Seventy-six 🔊
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77- Seventy-seven 🔊
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78- Seventy-eight 🔊
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79- Seventy-nine 🔊
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80- Eighty 🔊
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81- Eighty-one 🔊
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82- Eighty-two 🔊
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83- Eighty-three 🔊
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84- Eighty-four 🔊
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85- Eighty-five 🔊
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86- Eighty-six 🔊
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87- Eighty-seven 🔊
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88- Eighty-eight 🔊
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89- Eighty-nine 🔊
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90- Ninety 🔊
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91- Ninety-one 🔊
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92- Ninety-two 🔊
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93- Ninety-three 🔊
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94- Ninety-four 🔊
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95- Ninety-five 🔊
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96- Ninety-six 🔊
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97- Ninety-seven 🔊
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98- Ninety-eight 🔊
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99- Ninety-nine 🔊
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100- One hundred 🔊
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2. Types of numbers in English
Cardinal numbers
We use cardinal numbers to indicate quantity. They answer the question "How many?". Some examples include one, two, three, etc.
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101- One hundred one 🔊
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102- One hundred two 🔊
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150- One hundred fifty 🔊
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200- Two hundred 🔊
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201- Two hundred one 🔊
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204- Two hundred four 🔊
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206- Two hundred six 🔊
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250- Two hundred fifty 🔊
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300- Three hundred 🔊
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301- Three hundred one 🔊
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305- Three hundred five 🔊
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310- Three hundred ten 🔊
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350- Three hundred fifty 🔊
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400- Four hundred 🔊
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410- Four hundred ten 🔊
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425- Four hundred twenty-five 🔊
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450- Four hundred fifty 🔊
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500- Five hundred 🔊
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600- Six hundred 🔊
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700- Seven hundred 🔊
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800- Eight hundred 🔊
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900- Nine hundred 🔊
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1,000- One thousand 🔊
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2,000- Two thousand 🔊
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5,000- Five thousand 🔊
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10,000- Ten thousand 🔊
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50,000- Fifty thousand 🔊
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100,000- One hundred thousand 🔊
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500,000- Five hundred thousand 🔊
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1,000,000- One million 🔊
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9,876,543 - Nine million eight hundred seventy-six thousand five hundred and forty-three 🔊
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Ordinal numbers
We use ordinal numbers to indicate rank, order, or position.
- Barack Obama was the first African-American president of the United States.
- Donald Trump was the forty-fifth president of the United States.
- My brother was awarded the second-best prize at Spain's annual International Festival of Music and Dance.
- We live on the fourth floor.
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1st. first. 🔊
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2nd. second. 🔊
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3rd. third. 🔊
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4th. fourth. 🔊
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5th. fifth. 🔊
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6th. sixth. 🔊
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7th. seventh. 🔊
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8th. eighth. 🔊
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9th. ninth. 🔊
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10th. tenth. 🔊
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11th. eleventh. 🔊
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12th. twelfth. 🔊
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13th. thirteenth. 🔊
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14th. fourteenth. 🔊
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15th. fifteenth. 🔊
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16th. sixteenth. 🔊
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17th. seventeenth. 🔊
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18th. eighteenth. 🔊
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19th. nineteenth. 🔊
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20th. twentieth. 🔊
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21st. twenty-first. 🔊
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22nd. twenty-second. 🔊
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23rd. twenty-third. 🔊
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24th. twenty-fourth. 🔊
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25th. twenty-fifth. 🔊
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26th. twenty-sixth. 🔊
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27th. twenty-seventh. 🔊
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28th. twenty-eighth. 🔊
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29th. twenty-ninth. 🔊
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30th. thirtieth. 🔊
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40th. fortieth. 🔊
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50th. fiftieth. 🔊
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60th. sixtieth. 🔊
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70th. seventieth. 🔊
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80th. eightieth. 🔊
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90th. ninetieth. 🔊
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100th. hundredth. 🔊
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101st. hundred and first. 🔊
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1000th. thousandth. 🔊
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100000th. hundred thousandth. 🔊
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1000000th. millionth. 🔊
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1000000000th. billionth. 🔊
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Fractional numbers
A fraction is a way to show the parts of a whole thing. Imagine you have a pizza. If you cut it into pieces and take just a few of those, you’re taking a fraction of the pizza. The quantity at the top (numerator) says how many pieces you have, and the bottom one (denominator) tells you how many pieces the whole pizza was cut into. So, if you have 2 pieces out of 8, you write it as 2/8.
- 1/2 - one over two (commonly known as half)
- 1/3 - one over three (one-third)
- 2/3 - two over three (two-thirds)
- 1/4 - one over four (a quarter or one-fourth)
- 3/4 - three out of four (three-quarters or three-fourths)
- 1/5 - one out of five (one-fifth)
- 2/5 - two out of five (two-fifths)
- 1/6 - one over six (one-sixth)
- 5/6 - five over six (five-sixths)
- 1/7 - one out of seven (one-seventh)
- 1/8 - one over eight (one-eighth)
- 1/10 - one out of ten (one-tenth)
- 7/10 - seven out of ten (seven-tenths)
- 1/20 - one over twenty (twentieth)
- 47/100 - forty-seven out of a hundred (forty-seven hundredths)
- 1/100 - one over a hundred (a hundredth)
- 1/1,000 - one over a thousand (a thousandth)
Decimal numbers
Reading rules:
- Read the decimal point as "point.
- Read decimal part individually.
- Read the whole part normally.
- Zeroes after the decimal point can be read as “zero” or “oh.”
12.34 ”Twelve point three four“ “Twelve point thirty-four.”
12.05 This can be read as “Twelve point zero five” or “Twelve point oh five.”
In certain contexts, like money, decimal numbers are read differently. For example, $3.50 might be read as “three dollars and fifty cents” instead of “three point five zero.”
3. Other types of numbers mostly used in mathematics
| Integers |
| These include all whole numbers (both positive and negative) and zero: -3, -2, -1, 0, 1, 2, 3, etc. |
| Rational |
| They can be expressed as the quotient of two integers (a fraction) where the denominator is not zero: 1/2, -3/4, 5, 0.75, etc. |
| Irrational |
| They cannot be expressed as a simple fraction; they have non-repeating, non-terminating decimal expansions: π (pi), √2 (the square root of 2), etc. |
| Real |
| These include all rational and irrational numbers, including integers, and fractions 3.14, -1.5, 0, 2/3, etc. |
| Complex |
| Complex numbers include a real part and an imaginary part: a + bi (e.g., 4 + 5i), where bi is the imaginary part, and a is the real part. |
| Prime |
| Prime numbers are natural numbers greater than 1 that have no positive divisors other than 1 and themselves, including 2, 3, 5, 7, 11, etc. |
| Composite |
| These are natural numbers greater than 1 that are not prime; they have positive divisors other than 1 and themselves: 4, 6, 8, 9, 12, etc. |
| Even |
| These are integers divisible by 2: -4, 0, 2, 6, etc. |
| Odd |
| These are integers not divisible by 2 like -3, 1, 5, 9, etc. |
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