Răspuns:
ex 1:
I-1
V-5
IV-4
VI-6
X-10
IX-9
XI-11
L-50
XL-40
LX-60
C-100
XC-90
CX-110
D-500
CD-400
DC-600
M-1000
CM-900
MC-1100
MM-2000
Explicație pas cu pas:
ex 2.
450-CDL
619-DCXIX
582-DLXXXII
143-CXLIII
2760-MMDCCLX
1491-MCDXCI
2830-MMDCCCXXX
3999-MMMCMXCIX