Numbers

1 one         11 eleven
2 two         12 twelve         20 twenty            21 twenty-one
3 three       13 thirteen       30 thirty              32  thirty-two
4 four        14 fourteen       40 forty               43 forty-three
5 five         15 fifteen         50 fifty                 54 fifty-four
6 six           16 sixteen        60 sixty                65 sixty-five
7 seven      17 seventeen    70 seventy           76 seventy-six
8 eight        18 eighteen      80 eighty              88 eighty-eight
9 nine         19 nineteen      90 ninety              99 ninety-nine
10 ten                                100 (one) hundred

Exercise 1

84 eighty-four
13 thirteen
43 forty-three
98 ninety-eight
15 fifteen
55 fifty-five
33 thirty-three
62 sixty-two
70 seventy
12 twelve

Exercise 2

11 eleven
41 forty-one
64 sixty-four
14 fourteen
100 one hundred / a hundred
23 twenty-three
58 fifty-eight
35 thirty-five
13 thirteen
89 eighty-nine