3×12^(-2)=3/2⁴3²=1/48
3^(-2)-(-3)^(-1)=1/9-1/3=-2/9
0,4-(-0,25)^(-3)=0,4+64=64,4
3,5^(-1)+(-2,5)^(-2)=10/35+100/625=2/7+4/25=
50/175+28/175=78/175
3×12^(-2)=3/2⁴3²=1/48
3^(-2)-(-3)^(-1)=1/9-1/3=-2/9
0,4-(-0,25)^(-3)=0,4+64=64,4
3,5^(-1)+(-2,5)^(-2)=10/35+100/625=2/7+4/25=
50/175+28/175=78/175