Géométrie dans l’espace – ex 2

Exercice 2

Recopier et compléter les égalités suivantes :

Aires

$0,032 ~\text{km}^2 = \ldots ~\text{m}^2$
$\quad$
$57~\text{m}^2 = \ldots ~\text{hm}^2$
$\quad$
$3,5~\text{m}^2 = \ldots~ \text{mm}^2$
$\quad$
$725~\text{dm}^2 = \ldots~\text{dam}^2$
$\quad$
$850~\text{cm}^2 = \ldots ~\text{m}^2$
$\quad$
$0,02~\text{m}^2 = \ldots ~\text{cm}^2$
$\quad$
$82 ~\text{m}^2 = 820~000 \ldots$
$\quad$
$3~\text{km}^2 = 30~000\ldots$

$\quad$

Volumes

$5,765~\text{dm}^3 = \ldots \text{mm}^3$
$\quad$
$0,025~7 ~\text{dam}^3 = \ldots \text{l}$
$\quad$
$5,7~\text{hl} = \ldots \text{cm}^3$
$\quad$
$0,072~\text{cm}^3 = \ldots \text{cl}$
$\quad$
$5~700~\text{l} = \ldots \text{m}^3$
$\quad$
$4,75~\text{m}^3 = \ldots \text{cm}^3$

Correction

Aires

$0,032 ~\text{km}^2 = 32~000 ~\text{m}^2$
$\quad$
$57~\text{m}^2 = 0,005~7 ~\text{hm}^2$
$\quad$
$3,5~\text{m}^2 = 3~500~000~ \text{mm}^2$
$\quad$
$725~\text{dm}^2 = 0,072~5~\text{dam}^2$
$\quad$
$850~\text{cm}^2 = 0,085 ~\text{m}^2$
$\quad$
$0,02~\text{m}^2 = 200 ~\text{cm}^2$
$\quad$
$82 ~\text{m}^2 = 820~000~ \text{cm}^2$
$\quad$
$3~\text{km}^2 = 30~000~\text{dam}^2$

$\quad$

Volumes

$5,765~\text{dm}^3 = 5~765~000 ~\text{mm}^3$
$\quad$
$0,025~7 ~\text{dam}^3 = 25~700~\text{l}$
$\quad$
$5,7~\text{hl} = 570~000 ~\text{cm}^3$
$\quad$
$0,072~\text{cm}^3 = 0,007~2 ~\text{cl}$
$\quad$
$5~700~\text{l} = 5,7 ~\text{m}^3$
$\quad$
$4,75~\text{m}^3 = 4~750~000 ~\text{cm}^3$