Question

Va rog sa ma ajutati!

Answer 1

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.