Răspuns:
Ex. 1
a)87+6x[124-24:(8-8:4)]
=87+6x[124-24:(8-2)]
=87+6x(124-24:6)
=87+6x(124-4)
=87+6x120
=87+720
=807
b)4x[16x3x(8-4:2)+1]
=4x[48x(8-2)+1]
=4x(48x4+1)
=4x(192+1)
=4x193
=772
c)12x[3+4x(5+6:2)]
=12x[3+4x(5+12)]
=12x(3+4x17)
=12x(3+68)
=12x71
=852