Pr 4. 81:9=9 m pt fiecare rochie. 63:9=7 rochii.
Pr 5 AB+BC=282; BC+88=AB; AB se in- locuieste in prima ecuatie, BC+88+ BC=282; 2BC= 282-88; BC=194:2=97 AB=282-97=175
Pr 2 poza
a) XXV -25
L- 50
C- 100
b) CCCXVI - 316
DCXX-620
D- 500
c) MCCXX-1220
MMMDLV-3555
MCMXC-1990
