Haitian Creole/Numbers
To understand numbers in Haitian Creole, it is helpful to know French (but not necessary) because they are all derived from that language. The Haitian Creole numbers are mostly phonetic representations of how the same numbers are pronounced in French (changed according to a few rules), so if you know some rules regarding French pronunciation, you will understand Haitian Creole numbers more readily.
Zero to ten edit
#  Haitian Creole

1  en 

2  de  
3  twa  
4  kat  
5  senk  
6  sis  
7  sèt  
8  uit  
9  nèf  
10  dis 
Eleven to nineteen edit
#  Haitian Creole 

11  onz 
12  douz 
13  trèz 
14  katòz 
15  kenz 
16  sèz 
17  disèt 
18  dizwit 
19  disnèf 
One way to help you remember these numbers is that they all have "z" in them except 17,18,and 19
Twenty to twentynine edit
Twenty is ven. For the rest, you take either vent or ven and add the units number. Use vent for 1, 8 and 9. The only units number that is different from before is 1, which is eyen instead of en (which comes from French etun, "andone").
#  Haitian Creole 

20  ven 
21  venteyen 
22  vende 
23  ventwa 
24  venkat 
25  vensenk 
26  vensis 
27  vensèt 
28  ventwit 
29  vennèf 
Thirty to sixtynine edit
These are all similar to the twenties, where "ven" (20) is the only irregularity.
#  Haitian Creole  #  Haitian Creole  #  Haitian Creole  #  Haitian Creole 

30  trant  40  karant  50  senkant  60  swasant 
31  tranteyen  41  karanteyen  51  senkanteyen  61  swasanteyen 
32  trande  42  karande  52  senkande  62  swasande 
33  trantwa  43  karantwa  53  senkantwa  63  swasantwa 
34  trankat  44  karankat  54  senkankat  64  swasankat 
35  transenk  45  karansenk  55  senkansenk  65  swasansenk 
36  transis  46  karansis  56  senkansis  66  swasansis 
37  transèt  47  karansèt  57  senkansèt  67  swasansèt 
38  trantwit  48  karantwit  58  senkantwit  68  swasantwit 
39  trannèf  49  karannèf  59  senkannèf  69  swasannèf 
Seventy to seventynine edit
These are irregular. You take the word for "sixty" (swasant) and add the numbers 10–19 as though it were "sixtyten" for "seventy". This is also derived from French. Note that where in French you would say soixanteetonze (71), you say swasanonz, and not *swasanteyonz.
#  Haitian Creole 

70  swasandis 
71  swasanonz 
72  swasandouz 
73  swasantrèz 
74  swasankatòz 
75  swasankenz 
76  swasansèz 
77  swasandisèt 
78  swasandizwit 
79  swasandisnèf 
Extra Practice 

A worksheet covering this material is available at Wikiversity. 