I=U/(R1+R2+R3+R4)=100/(100+900+9000+90000)=0.001 A
U12=R1*I=100*0.001=0.1 B
U13=I*(R1+R3)=0.001*(100+900)=1 B
U14=I*(R1+R2+R3)=0.001*(100+900+9000)= 10 B
I=U/(R1+R2+R3+R4)=100/(100+900+9000+90000)=0.001 A
U12=R1*I=100*0.001=0.1 B
U13=I*(R1+R3)=0.001*(100+900)=1 B
U14=I*(R1+R2+R3)=0.001*(100+900+9000)= 10 B