A 3+3x[3+1x(3+9)]:15=3+3x(3+1x12):15=3+3x(3+12):15=3+3x15:15=3+3x1=3+3=6
B 811-4x[6x(61-3600:12:30)]:9=811-4x[6x(61-300:30)]:9=811-4x[6x(61-10)]:9=811-4x(6x51):9=811-4x306:9=811-4x34=811- 136=
675
C [214+240:(16-2x5)]x25-25:25=[214+240:(16-10)]x25-1=(214+240:6)x25-1=(214+40)x25-1= 254x25-1=6350-1=6349
Sper ca te-am ajutat
