Răspuns:
a) -2 × (-9)+17+1 = -18+18=0
b) -12+16×(-2)-15 = -12-32-15= -44-15=-59
c) 4-3-2+2×3= 4-3-2+6= 1+4=5
d)-1×{-13+[-15-3×(-4)×(-2)]}/ 7= -1×[-13+(-15-3×8]/7= -1× (-13-39)/7= -1×(-52)/7= 52/7=7,42
