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This is how we write the numbers 1-10:

1   one
2 two
3 three
4 four
5 five
6 six
7 seven
8 eight
9 nine
10 ten
 

 

This is how we write numbers from 11 to 20.

11   eleven
12 twelve
13 thirteen
14 fourteen
15 fifteen
16 sixteen
17 seventeen
18 eighteen
19 nineteen
20 twenty
 

 

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