А) 1. 38*(-3)=-114
2.(-24)*(-4)=96
3.(-16)*(-30)=480
4.-114-96=-210
5.-210+480=270
б) 1.-2.8+6.1=3.3
2.3.3-3.4=-0.1
3.-0.1+6.2=6.1
4.6.1*(-3.4)=-20.74
в) 1.4.3-7.8=-3.5
2.-5.6+8.3=2.7
3.-3.5*2.7=-9.45
г) 1.-3 1/3+2 5/6=-3 2/6+2 5/6=-1 3/6=-1 1/3
2.-8 5/9+7 2/9=-1 3/9=-1 1/3
3.-1 1/3*(-1 1/3)=1 7/9
д) 1.1 1/3*(-3/4)=4/3*(-3/4)=-1
2.(-2 1/7)*1 2/5=(-15/7)*7/5=-3
3.-1-(-3)=2
е) 1.-24.3*5/9=-13.5
2.-15.3-13.5=-28.8
3.5/6*(-28.8)=-24