Odpowiedzi

2010-03-09T20:46:41+01:00
7,5km²=75000000000cm²
5a=1000000cm²
2010-03-09T20:47:49+01:00
7,5km2=7,5*10000=75 000 cm^2
5a=5*1 000 000=5 000 000cm^2
pozdrawiam:)
2010-03-09T20:48:22+01:00
7,5km2=7,5 * 1 km * 1km =
=7,5 * 1000m *1000m=
=7,5 * 100 000cm * 100 000cm =
=75 000 000 000cm2

5a=500 m2=500 * 1m *1m=
= 500 * 100cm * 100cm=
=5 000 000cm2