3. Calculaţi:
a) 15 -5.2 +8:4; b) [63: (1 +22+4:2) - 4.2]-7-5; c) 9.6-2.[(11 +7.3): 2 + 32); d) {15.4 +15. 16-20 - [(52 -32 + 2):8-21}:



Vă raogg!​