unité d'aire

Recopier et compléter:
a. $0,\!385~\!\text{m}^2=$ .... $\text{dm}^2$
b. $2,\!54~\!\text{cm}^2=$ .... $\text{mm}^2$
c. $0,\!27~\!\text{m}^2=$ .... $\text{cm}^2$

Recopier et compléter:
a. $183~\text{mm}^2=$....$\text{ cm}^2$
b. $12~000~\text{cm}^2=$....$\text{ m}^2$
c. $34~000~\text{dm}^2=$....$\text{ hm}^2$
d. $3~600~\text{m}^2=$....$\text{ km}^2$