Explicație pas cu pas:
a. I) (8×6)+(2×9)-(5×3)=48+18-15=66-15=51
II) 8×(6+2)×(9-5)×3= 8×8×4×3=64×12=768
B I) (12:3)+(3×16)-(20×6)= 4+48-120= 52-120=-68
II) 12:(3+3)×(16-20)×6= 12: 6×(-4)×6= 2×(-24) = -48
C I) (9×2)+(4×3)+(10:2)=18+13+5=31+5=36
II) 9×(2+4)×(3+10):2=9×6×30:3=54×10=540
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