Răspuns :
1)
(1/2)^(-1)+(1/3)^(-1)=2+3=5
2)
3 mingi.....15 lei
8 mingi.......x lei
x=8*15/3=8*5=40 lei
3)
28:5=5 rest 3
5 intregi
4)
Vezi poza
5)
A romb= d1*d2/2=80/2=40 m^2
1)
(1/2)^(-1)+(1/3)^(-1)=2+3=5
2)
3 mingi.....15 lei
8 mingi.......x lei
x=8*15/3=8*5=40 lei
3)
28:5=5 rest 3
5 intregi
4)
Vezi poza
5)
A romb= d1*d2/2=80/2=40 m^2