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ce numar reprezinta cifrele romane CCXII si CXL

Răspuns :

CCXII-212
CXL-140
...........
CCXII -----> 212

CC=200
X=10
II=2

CCXII = 200+10+2=CC+X+II

_______________________

CXL --------> 140

CXL = 100+40 = C+ XL


C= 100

XL=50-10
XL=40