One to twenty
1eins
2zwei
3drei
4vier
5fünf
6sechs
7sieben
8acht
9neun
10zehn
11elf
12zwölf
13dreizehn
14vierzehn
15fünfzehn
16sechzehn
17siebzehn
18achtzehn
19neunzehn
20zwanzig
A useful sentence
Ich bin [Zahl] Jahre alt.
I am [number] years old.
13
13 to 19: add "zehn" after the first digit.
drei + zehn = dreizehn. vier + zehn = vierzehn.
20
Zwanzig (20) does not follow the "-zehn" pattern. Learn it by itself.
Zwölf (12) is also irregular. Learn it directly.
Practice
What is "sieben" in English?
How do you say 12 in German?
Which German word means "fifteen"?
What does "zwanzig" mean?
What comes after "neun" (9)?