Question

Copiii au 30 pde crengi de brad Si 9de molid.
Ei pun crengile 3 in fiecare decoratiune.
Cate decoratiuni au realizat ?
(Rezolva in 2 moduri)

Answer 1

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