Răspuns:
68.
a) XLV, IXX, XVII, LVI, LXVIII
b) CCLVI, DXCI, CDXCVII, CMLXXV
c) MCDXXXII, MDCI, MDCCCLXXXIX, MMXVI
69.
a) IC,C,CI,CII,CIII,CIV,CV,CVI
b) CCXLVIII, CCXLIX, CCL, CCLI, CCLII, CCLIII,CCLIV
c) MMCMXCIX, MMM, MMMI, MMMII, MMMIII, MMMIV, MMMV,MMMVI, MMMVII
70.
a) 554, 263, 80, 290
b) 1449, 36, 3277, 1974
71. I ianuarie, XXXI decembrie
72.
a) IV, VI, IX, XI, XL, LIX, CX, MDX
b) CCXXX, CCXCI, MCCCLX, MDC, MMCCXXIII
