Obliczenia :
[tex]0,5 \ km^2=0,5\cdot(1000 \ m)^2=0,5\cdot1 \ 000 \ 000 \ m^2=\boxed{500 \ 000 \ m^2}\\\\2 \ km^2=2\cdot(1000 \ m)^2=2\cdot1 \ 000 \ 000 \ m^2=\boxed{2 \ 000 \ 000 \ m^2}\\\\12 \ 500 \ cm^2=12 \ 500\cdot(0,01 \ m)^2=12 \ 500\cdot0,0001 \ m^2=\boxed{1,25 \ m^2}\\\\2500 \ dm^2=2500\cdot(0,1 \ m)^2=2500\cdot0,01 \ m^2=\boxed{25 \ m^2}[/tex]
