9.
a) 27,5dm^2=0,275cm^2
2,5m^2=0,00025cm^2
0,1m^2=0,00001cm^2
1500mm^2=15cm^3
b)0,5km^2=500000m^2
2km^2=2000000m^2
12500cm^2=1,25m^2
2500dm^2=25m^2
10.
500*1mm^2=500mm^2
500mm^2=5cm^2
