Explicație:
1)15dam=0.15km=150m
4hm=0.4km=400m
P=2(0.15+0.4)=2×0.55=1.1km
S=400×150=60000m²
2)23dam=230m=23000cm=230000mm
0,79m=79cm=790mm
P=2(230000+790)=461580mm
S=23000×79=1817000cm²
S=230×0,79=181.7m²
3)0.01km=1dam=10m
2×10³cm=2000cm=20m=2dam=0.02km
P=2(1+2)=6dam
S=0.01×0.02=0.0002km²
S=10×20=200m²
Toate astea se fac cu puteri ale lui 10.
Daca ai intrebari spune.mi.
