Question

Ma ajuta cineva ?Trei pixuri si doua creioane cantaresc 290g iar 2 pixuri si trei creioane cantaresc 285 g .Cat cantareste un pix? Dar un creion?prin metoda comparari

Answer 1

3p.................................................2c....................................290g

2p.................................................3c....................................285g

Asa ca inmultim randurile.
3p.................................................2c....................................290g x3

2p.................................................3c....................................285g x2

9p.................................................6c....................................870g

4p.................................................6c....................................570g


870g-570g=300g
9p-4p=5p
300g=5p
300:5=60g(un pix)
6c=570-60x4--->6c=570-240------->6c=330
330:6=50 rest 30(un creion)