罗马数字里1-9如何表示?

Ⅰ1；Ⅱ2；Ⅲ3；Ⅳ4；Ⅴ5；Ⅵ6；Ⅶ7；Ⅷ8；Ⅸ9；Ⅹ10；Ⅺ11；Ⅻ12

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
XXV, 25
XXIX, 29
XXX, 30
XXXI, 31
XXXIV, 34
XXXV, 35
XXXIX, 39
XL, 40
L, 50
LI, 51
LV, 55
LX, 60
LXV, 65
LXX, 70
LXXX, 80
XC, 90
XCIII, 93
XCV, 95
XCVIII, 98
IC, 99
C, 100
CC, 200
CCC, 300
CD, 400
D, 500
DC, 600
DCC, 700
DCCC, 800
CM, 900
M, 1000
MC, 1100
MCD, 1400
MD, 1500
MDC, 1600
MDCLXVI, 1666
MDCCCLXXXVIII, 1888
MDCCCXCIX, 1899
MCM, 1900
MCMLXXVI, 1976
MCMLXXXIV, 1984
MCMXC, 1990
MM, 2000

数字·罗马数字