Question

1.Calculati perimetrul unui triunghi ABC care are:
AB=21 m.
BC=1300 cm.
AC=0,1 hm.
2.Transformati in decametri:
a)23,8 m.
b)32,6 hm.
c)12,5 dm.
d)15000 mm.
e)5,4 km.
f)80400 cm.
3.Transformati 34,5 hm. in:
a)cm.
b)dam.
c)km.
d)dm.
e)m.
f)mm.
4.Transformati in metri:
a)2 dam.
b)32 cm.
c)17,3 hm.
d)0,35 hm.
e)7000 mm.
f)18,75 dam.
5.Transformati 16 dm. in:
a)cm.
b)dam.
c)m.
d)hm.
e)mm.
f)km.
6.Calculati latimea unui dreptunghi care are perimetrul de 34cm. si lungimea de 120 mm.
Va rogg mult sa ma ajutati daca puteti la toate exercitiile!!Multumesc anticipat..dau coronita!!

Answer 1

1.P=AB+BC+AC
BC=1300cm=1300:100=10m
AC=0,1hm=0,1×100=10m
P=21+13+10=34+10=44m

2.a)23,8m=23,8:10=2,30dam
b)32,6hm=32,6×10=326dam
c)12,5dm=12,5:100=0,125dam
d)1500mm=1500:10000=1,5dam
e)5,4km=5,4×100=540dam
f)80400cm=80400:1000=80,4dam

3.a)34,5hm=34,5×10000=34500cm
b)34,5hm=34,5×1000=345dam
c)34,5hm=34,5:10=3,45km
d)34,5hm=34,5×1000=12500dm
e)34,5hm=34,5×100=3450m

4.a)2dam=2×10=20m
b)32cm=32:100=0,32m
c)17,3hm=17,3×100=1730m
d)0,35hm=0,35×100=35m
e)7000mm=7000:1000=7m
f)18,75dam=18,75×10=187,5m

5.a)16dm=16×10=160cm
b)16dm=16:100=0,16dam
c)16dm=16:10=1,6m
d)16dm=16:1000=0,016hm
e)16dm=10×100=1600mm
f)16dm=16:10000=0,0016km

6.P=34cm
L=120m=120:10=12cm
l=?
P=2 (L+l)
34=2 (12+l)
12+l=34:2=17
l=17-12=5cm

Sper ca te-am ajutat!