Odpowiedzi

2010-02-24T16:17:47+01:00
A) 20dm×7dm=140dm²
b) 3cm× 800000cm = 2400000cm²= 240m²
c) 50cm×0,4cm= 20cm²
d) 6000m× 0,3m = 18000m²
e) 1dm × 1,6dm = 1,6dm²
f) 200cm × 0.1cm = 20cm²
2010-02-24T16:18:40+01:00
A) a)2m x 7dm
7dm = 0,7m
P = 0,7*2
P = 1,4m2

b)3cm x 8km
8km = 8000m = 800000cm
P = 3*800000
P = 2 400 000cm2

c)5dm x 4mm
5dm = 50cm = 500mm
P = 500*4
P = 2000mm2

d)6km x 30dm
6km = 6000m = 60000dm
P = 30*60000
P = 1800000dm2

e)1dm x 160cm
1dm = 10cm
P = 10*160
P = 1600cm2

f)2m x 10mm
2m = 200cm=2000mm
P = 2000 * 10
P = 20000mm2