Question

COPIII AU 30DE CRENGI DE BRAD SI 9 DE MOLID. EI PUN CRENGILE CATE 3 IN FIECARE DECORATIUNE. CATE DECORATIUNI AU REALIIZAT? REZOLVA IN 2 MODURI .

Answer 1

1) (30+9) :3=13 decoratiuni
    30+9=39 crengi in total
     39:3=13 decoratiuni
2) (30:3) + (9:3)=13 decoratiuni
     30:3=10
    9:3=3
      10+3=13 decoratiuni