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Aflati jumatatea numerelor :14;8:16;.Efectueaza proba prin operatie inversa.b)Afla sfertul numerelor:28;16,40;

Răspuns :

14:2=7; 7x2=14
8:2=4; 4x2=8
16:2=8; 8x2=16

28:4=7
16:4=4
40:4=10