ajutatima va rog frumos

lungime dreptunghi =23+6cm+12+5+4dm+1m
=29cm+21dm+1m
lățime =15+4+4cm+8+2dm+1m
=24cm+10dm+1m
apoi transformi si afli cât =l si L

1. lungimea=23cm
latimea= 15 cm
Perimetru= 2(15+23)= 2×38=76cm
2.lungimea=12dm
lățimea=8dm
perimetru=2(12+8)=2×20=40dm
3.lungimea=5dm 6cm=56cm
lățimea=2dm 4cm=24cm
perimetru= 2(24+56)=2×80=160cm
4.lungimea=1m 4dm=100cm+40cm=140cm
latimea=1m 4cm=100cm+4cm=104cm
perimetru=2(140+104)= 2×244=488cm