1.(3-10)+4×(-2) 2.28+7×(-5) 3.-12+20×4-(-6):3 4.14+(18:(-3-1)-(-2)×3

1.  (3-10)+4.(-2) = -7-8 = 15
2.  28+7.(-5)= 28-35 = -7
3 -12+20.4-(-6):3 = 8.8 = 64
4 14+(18:(-3-1)-(-2).3 = 14+ (18: (-4)+6) = 14+(-6) = 14-6 = 8