Question

Din scoala noastra au plecat in tabaraq 270 elevi.Elevii din cl II siIV sunt impreuna 240,iar din cl II si III sunt 120. Cati elevi au plecat in tabara din fiecare clasa

Answer 1

II =B III=C IV=D B+D=240 270-240=30 elevi (clasa a III) B+C=120 B+30=120 B=120-30 B=90 elevi (clasa a II) 240-90=150 elevi (clasa a IV)

Answer 2

II+III+IV=270
II+IV=240
II+III=120
120+IV=270=>IV=270-120=>IV=150 elevi cls a4a
II+150=240=>II=240-150=>II=90 levi cls. a2a
90+III=120=>III=120-90=>III=30 elevi cls a3a