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in doua cutii sunt 64 de biscuiti daca as lua 7 biscuiti din prima cutie si i- as pune in a dous cutie in cele doua cuti ar fi numar egal de biscuiti cati biscuiti dunt in fiecare cutie?

Răspuns :

64:2=32

32+7= 39 biscuiti in prima cutie

32-7=25 biscuiti in a doua cutie


Proba: 39-7= 32

              25+7=32

In ambele cutii ar fi acelasi numar de biscuiti