a)

Wiemy, że:

$1\text{m}=100\mathrm{cm}$

zatem:

$1\mathrm{cm}=0,01\text{m}$

P (prawda)

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b)

Wiemy, że:

$1\mathrm{kg}=1000\text{g}$

zatem:

$1\text{g}=0,001\mathrm{kg}$

$9\text{g}=0,009\mathrm{kg}\ne 0,09\mathrm{kg}$ 

F (fałsz)

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c) 

Wiemy, że:

$1\text{t}=1000\mathrm{kg}$

zatem:

$1\mathrm{kg}=0,001\text{t}$

$60\mathrm{kg}=0,060\text{t}=0,06\text{t}$

P (prawda)

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d)

Wiemy, że:

$1{\text{m}}^2=100{\text{dm}}^2$

Zatem:

$1{\text{dm}}^2=0,01{\text{m}}^2$

$25{\text{dm}}^2=0,25{\text{m}}^2$

P (prawda)