a)13*(-3)-4*(-20)=
b)100:(-20)-5*(16-100)=
c)5*(-18-20)-4*(16-100)=
d)-4*(-1)*(-22)-4*8*11
e)20-(13-11+18-13):7
f) 12+5*[18-2*(11+19)-20:(20)]=
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a)41
b) 415
c)-106
d)-440
e) 19
f)-203
a)13*(-3)-4*(-20)=-39 -(-80)=-39+80=80-38=41
b)100:(-20)-5*(16-100)=-5 -5·(-84)=-5-(-420)=-5+420=420-5=415
c)5*(-18-20)-4*(16-100)= 5·(-38)-4·(-84)=-190 -(-336)=-190+336=336-190=146
d)-4*(-1)*(-22)-4*8*11 =4·(-22) -352=-88-352=-440
e)20-(13-11+18-13):7 =20-7:7=20-1=19
f) 12+5*[18-2*(11+19)-20:(20)]= 12+5·[16·30-1]=12+5·479=12+2395=2407