Răspuns :
Salut,
a) LXXXIX :
L = 50
X = 10
IX = 9
50+30+9 = 80+9 = 89.
b) MCMXVIII :
M = 1000
C = 100
X = 10
V = 5
III = 3
1000-100+1000+10+5+3 = 1900+18 = 1918.
c) MCMLXXXIX :
M = 1000
C = 100
L = 50
X = 10
IX = 9
1000-100+1000+50+30+9 = 1900+89 = 1989.
d) MMXV :
M = 1000
X = 10
V = 5
1000+1000+10+5 = 2000+15 = 2015.
e) MDC :
M = 1000
D = 500
C = 100
1000+500+100 = 1500+100 = 1600.
f) CVI :
C = 100
VI = 6
100+6 = 106.
g) MCCCXXX :
M = 1000
C = 100
X = 10
1000+300+30 = 1300+30 = 1330.
h) MCMXLV :
M = 1000
C = 100
X = 10
L = 50
V = 5
1000-100+1000+40+5 = 1900+45 = 1945.
i) MDCCCXLVIII
M = 1000
D = 500
C = 100
X = 10
L = 50
VIII = 8
1000+800+40+8 = 1800+48 = 1848.
Succes! :3
a) LXXXIX :
L = 50
X = 10
IX = 9
50+30+9 = 80+9 = 89.
b) MCMXVIII :
M = 1000
C = 100
X = 10
V = 5
III = 3
1000-100+1000+10+5+3 = 1900+18 = 1918.
c) MCMLXXXIX :
M = 1000
C = 100
L = 50
X = 10
IX = 9
1000-100+1000+50+30+9 = 1900+89 = 1989.
d) MMXV :
M = 1000
X = 10
V = 5
1000+1000+10+5 = 2000+15 = 2015.
e) MDC :
M = 1000
D = 500
C = 100
1000+500+100 = 1500+100 = 1600.
f) CVI :
C = 100
VI = 6
100+6 = 106.
g) MCCCXXX :
M = 1000
C = 100
X = 10
1000+300+30 = 1300+30 = 1330.
h) MCMXLV :
M = 1000
C = 100
X = 10
L = 50
V = 5
1000-100+1000+40+5 = 1900+45 = 1945.
i) MDCCCXLVIII
M = 1000
D = 500
C = 100
X = 10
L = 50
VIII = 8
1000+800+40+8 = 1800+48 = 1848.
Succes! :3