1)г) 3^(-2)=1/9; 2)б) 7,3*10^(-4); 3) -10^2*0.3=0.3*(-100)=-30; 4)25*5^(-3)=25/125=1/5=0.2; 5) 7^0:7^2=7^(0-2)=7^(-2)=1/49; 7^(-2)*7^2=7^(-2+2)=7^0=1; 7^(-3):7^(-4)=7^(-3-(-4))=7^(-3+4)=7; 6) (7,2*10^(-3))*(3*10^(-1))=0.0072*0.3=0.00216=2.16*10^(-3); 7) (x^12*x^24)/x^33=x^(12+24)/x^33=x^36/x^33=x^3; x^3=-2^3/3^3=-8/27=-3,375; 8) 4^(-2-(-3))+10/4-1=3+10/4=22/4=5,5; 9) 0.0001*19=0.0019; 10) 100^(2n+3)*0.1^2(2n+3)=100^(2n+3)*0.01^(2n+3)=(100*0.01)^(2n+3)=1^(2n+3)=1.