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Intr-o cutie de ciocolata se afla 18 bomboane.Cate bomboane se afla in 3 cutii de ciocolata?Dar in 4 cutii cu acelasi continut?

Răspuns :

1 cutie=18 bomboane
3 cutii=3x18=54 bomboane
4 cutii=4x18=72  bomboane
1 cutie---------------18 bomboane
3 cutii----------------x  bamboane
1*x=3*8
x=54 bomboane
4 cutii---------------x  bomboane
1*x=4*18
x=72 bomboane