Numbers in Cantonese

One - 一 - Yat
Two - 二 - Yi  - There is also another way of saying two 兩 - Lurng
Three - 三 - Saam
Four - 四 - Sei
Five - 五 - Ng
Six - 六 - Luk
Seven - 七 - Tsaat
Eight - 八 - Baat
Nine - 九 - Gau
Ten - 十 - Sap

One to ten are the basic numbers you need to know. The rest branch off the main ten. For example

Eleven - 十一 - Sap yat
Twelve - 十二 - Sap yi

Twenty - 二十 - Yi sap
Twenty one - 二十一 - Yi sap yat
Twenty two - 二十二 - Ji sap yi

There is also another way of typing twenty 廿 which is pronounced "yaa".
So the rest of the numbers in the twenties can also be typed with "yaa" 廿 replacing "yi sap" 二十。

Thirty - 三十 - Saam sap
etc

One hundred - 一百 - Yat baak

Two hundred - 二百 - Yi baak

One thousand - 一千 - Yat cheen

Ten thousand - 一萬 - Yat maan

One million - 一百萬 - Yat baak maan