数字Most languages have number systems, and these can vary quite a bit. Scroll down to discover and learn interesting number systems from all around the world.

大多数语言都有数字系统，这些系统可能会有很大差异。向下滚动以发现和学习来自世界各地的有趣数字系统。

21
[二十一]
[Nijūichi]

22
[二十二]
[Nijūni]

23
[二十三]
[Nijūsan]

24
[二十四]
[Nijūyon]

25
[二十五]
[Nijūgo]

26
[二十六]
[Nijūroku]

27
[二十七]
[Nijūnana]

28
[二十八]
[Nijūhachi]

29
[二十九]
[Nijūkyū]

30
[三十]
[Sanjū]