za każdym razem możemy układać proporcje
1m=100cm
1m^2=10000cm^2
x m^2=142cm^2
x=\frac{142}{10000}=0,0142m^2
1m=10dm
1m^2=100dm^2
x m^2=340dm^2
x=3,40m^2
1m=100cm
1m^2=10000cm^2
x m^2=12,6cm^2
x=\frac{12,6}{10000}=0,00126m^2
1m=100cm
1m^2=10000cm^2
x m^2=2000cm^2
x=\frac{2000}{10000}=0,2m^2
a(ar) = 10m*10m=100m^2
5a=500m^2
12,5a=1250m^2
ha(hektar)=100m*100m=10000m^2
0,035ha=350m^2
1cm=0,01m
1cm^2=0,0001m^2
x cm^2=350m^2
x=\frac{350}{0,0001}=3500000cm^2
ha=100m*100m=1000dm*1000dm=1000000dm^2
1ha=1000000dm^2
x ha=500000dm^2
x=\frac{500000}{1000000}=0,5ha
a=10m*10m=100dm*100dm=10000dm^2
1a=10000dm^2
x a=800dm^2
x=\frac{800}{10000}=0,08a
a=10m*10m=1000cm*1000cm=1000000cm^2
1a=1000000cm^2
x a=45000cm^2
x=\frac{45000}{1000000}=0,045a
1m=100cm
1m^2=10000cm^2
x m^2=5000cm^2
x=\frac{5000}{10000}=0,5m^2