a) (-8).(-12).(-125) = (-4).(-125).(-12)*2 = 5*100*24 = 120*100 = 12000
b) Rút (-134) ra ngoài
=> (-134).(1-51+48) = (-134).(-2) = 268
c)45.(-24) + (-10).(-12) = 5*9*(-24) + (-5)(-24) = 120. (-9 +1) = 120*8 = 960
d) (-4^2).3^2.(-5)^3 = -(4.5)^2.9.(-5) = -4*(-45)*100 = 180.100 = 18000