Numbers
If you're trying to learn numbers you will find some useful resources including a course about Cardinal Numbers and Ordinal Numbers to help you with your grammar.
Try to concentrate on the lesson and notice the pattern that occurs each time the word changes its place.

Learning the numbers is very important because its structure is used in every day conversation.
The more you master it the more you get closer to mastering the Flemish language.

Cardinal number convey the "how many" they're also known as "counting numbers," because they show quantity. Here are some examples:

numbers	getallen
one	één
two	twee
three	drie
four	vier
five	vijf
six	zes
seven	zeven
eight	acht
nine	negen
ten	tien
eleven	elf
twelve	twaalf
thirteen	dertien
fourteen	veertien
fifteen	vijftien
sixteen	zestien
seventeen	zeventien
eighteen	achttien
nineteen	negentien
twenty	twintig
hundred	honderd
one thousand	duizend
million	miljoen

Notice the structure of the numbers.

List of Ordinal Numbers
Ordinal numbers tell the order of things in a set: first, second, third, etc. Ordinal numbers do not show quantity.
They only show rank or position. Below is a list of the Cardinal Numbers and Ordinal Numbers.
Memorizing this table will help you add very useful and important words to your vocabulary.

Ordinal Numbers	rangtelwoorden
first	eerste
second	tweede
third	derde
fourth	vierde
fifth	vijfde
sixth	zesde
seventh	zevende
eighth	achtste
ninth	negende
tenth	tiende
eleventh	elfde
twelfth	twaalfde
thirteenth	dertiende
fourteenth	veertiende
fifteenth	vijftiende
sixteenth	zestiende
seventeenth	zeventiende
eighteenth	achttiende
nineteenth	negentiende
twentieth	twintigste
once	één keer
twice	twee keer

source: mylanguages