a)
7 mm=7⋅0,001 m=7⋅10−3 m
b)
2,3 mm=2,3⋅0,001 m=2,3⋅0,001⋅0,001 km=
=2,3⋅0,000001 km=2,3⋅10−6 m
c)
18 cm=18⋅0,01 m=1,8⋅10⋅0,01 m=1,8⋅0,1 m=1,8⋅10−1 m
d)
125 dm=125⋅0,1 m=125⋅0,1⋅0,001 km=125⋅0,0001 km=
=1,25⋅100⋅0,0001 km=1,25⋅0,01 km=1,25⋅10−2 km
e)
12 g=12⋅0,001 kg=1,2⋅10⋅0,001 kg=
=1,2⋅0,01 kg=1,2⋅10−2 kg
f)
300 mg=3⋅100 mg=3⋅100⋅0,001 g=3⋅0,1 g=
=3⋅0,1⋅0,001 kg=3⋅0,0001 kg=3⋅10−4 kg
g)
15 ml=15⋅0,001 l=1,5⋅10⋅0,001 l=
=1,5⋅0,01 l=1,5⋅10−2 l
h)
25 dag=2,5⋅10 dag=2,5⋅10⋅0,01 kg=2,5⋅0,1 kg=
=2,5⋅0,1⋅0,001 t=2,5⋅0,0001 t=2,5⋅10−4 t
i)
1,4 kg=1,4⋅0,001 t=1,4⋅10−3 t
j)
2,5 l=2,5⋅0,01 hl=2,5⋅10−2 hl
k)
400 ml=4⋅100 ml=4⋅100⋅0,001 l=4⋅0,1 l=
=4⋅0,1⋅0,01 hl=4⋅0,001 hl=4⋅10−3 hl
l)
2 mg=2⋅0,001 g=2⋅10−3 g