Romana cifri
Etoso
![](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/9/91/BiberachUlmerTor060408_P1040527.jpg/220px-BiberachUlmerTor060408_P1040527.jpg)
Romana cifri esas cifro-sistemo la Romani uzis. La sistemo uzas literi transar la nombri. La Romana cifri esas:
I | V | X | L | C | D | M |
1 | 5 | 10 | 50 | 100 | 500 | 1000 |
E quale konstruktar plu granda nombri (en la plu anciena sistemo):
IIII | V | VIIII | X | XXXXVIIII | L | LXXXXVIIII | C | CCCCXXXXVIIII | D | DCCCCXXXXVIIII | e.c. |
4 | 5 | 9 | 10 | 49 | 50 | 99 | 100 | 449 | 500 | 949 | |
1×4 | 9+(1×4) | 10×4+5+(1×4) | 50+(10×4)+5+(1×4) | 100×4+50+(10×4)+5+(1×4) | 500+(100×4)+50+(10×4)+5+(1×4) |
- Notez ke la maxim granda nombri omnatempe esas an la komenco
En plu recente tempi (dum la Mezepoko), la sistemo chanjis:
IV | V | IX | X | XLIX | L | XCIX | C | CDXLIX | D | CMXLIX | e.c. |
4 | 5 | 9 | 10 | 49 | 50 | 99 | 100 | 449 | 500 | 949 | |
5-1 | 10-1 | 50-10+(10-1) | 100-10+(10-1) | 500-100+(50-10)+(10-1) | 1000-100+(50-10)+(10-1) |
![](https://cdn.statically.io/img/upload.wikimedia.org/wikipedia/commons/thumb/d/db/Butovick%C3%A1_18%2C_letopo%C4%8Det_ve_%C5%A1t%C3%ADtu.jpg/220px-Butovick%C3%A1_18%2C_letopo%C4%8Det_ve_%C5%A1t%C3%ADtu.jpg)