1-9 Ⅰ Ⅱ Ⅲ Ⅳ Ⅴ Ⅵ Ⅶ Ⅷ Ⅸ
10 Ⅹ
11-19在(1-9)这些数左面加X
20 XX
21-29在(1-9)这些数左面加XX
30 XXX
31-39在(1-9)这些数左面加XXX
40 XL
41-49在(1-9)这些数左面加XL
50 L
51-59在(1-9)这些数左面加L
60 LX
61-69在(1-9)这些数左面加LX
70 LXX
71-79在(1-9)这些数左面加LXX
80 LXXX
81-89在(1-9)这些数左面加LXXX
90 XC
91-99在(1-9)这些数左面加XC
100 C
1-100
追加悬赏
更丰富反反复复方法
I - 1
II - 2
III - 3
IV - 4
V – 5
VI - 6
VII – 7
VIII - 8
IX - 9
X – 10
XI – 11
XII – 12
XIII – 13
XIV – 14
XV – 15
XVI – 16
XVII – 17
XVIII – 18
XIX – 19
XX – 20
XXI – 21
XXII – 22
XXVIII - 28
XXIX - 29
XXX - 30
XL - 40
L - 50
LX - 60
LXX - 70
LXXX - 80
XC - 90
XCIX - 99
C - 100