Question

Pt a confectiona 5 costume se folosesc 20m material ;cati metri de material se folosesc pentru a confectiona 7 costume? Rez ptoblema prin exercițiu

Answer 1

5c⇒20m;
7c⇒x[m]⇒marimi direct proportionale;
⇒x=7c·20m/5c⇒se reduce c cu c;
⇒x=7·20m/5=7·4m=28[metri-necesari];

Answer 2

1) 20m:5=4m(1costum)
2)7x4m=28m(7costume)
sper ca team ajutat